Best Aquarium CO2 Diffuser-2020

Carbon dioxide (CO2) plays an important role as a nutrient for successful plant growth in the aquarium. During the process of photosynthesis, aquatic plants remove CO2 from their environment. In this process, aquatic plants use CO2 and H2O to produce carbohydrate (C6H12O6) and Oxygen (O2) with the help of light energy. Generally, the planted aquarium should have sufficient CO2.  

A medium-level plant requires CO2 about 10-15 mg/L while advanced plants need CO2 15-30 mg/L. But a high level of CO2 is lethal to your fish that can also cause death to your fish. For optimum growth with beautiful plant colors, you should take care and maintenance. In this case, you can add CO2, macronutrients like iron (Fe), nitrogen (N), phosphorous (P), manganese (Mn), and micronutrients inside your aquarium. Aquarium plants can absorb these nutrients through their leaves and roots.

Aquarium plants use free CO2 to perform photosynthesis.  For this reason, plants need essential factors such as fertilizers, lighting, and CO2 that govern the speed of growth and health. If you use modern T5 or LED lighting system and the substrate or liquid fertilizers in the aquarium that can make the aquarium unbalanced. Hence CO2 is very important for your aquarium plants to make the balanced aquarium otherwise huge algae growth has an effect over the fish tank.

In many cases, high CO2 can produce carbonic acid (H2CO3) when dissolved in water that leads to pH swings in the aquarium. This problem often occurs at night when plants do not perform photosynthesis. In this case, the pH level in the aquarium water drops rapidly and can be harmful to aquarium organisms. So adding CO2 to the planted aquarium should be closely observed.

For making microbubbles, the best type of CO2 diffuser is essential. It should be safe, secure, and does not leak. There are many high-quality CO2 diffusers in the pet business sector with a reasonable price tag. You should use high-quality brands that provide better performance that fulfill your requirements. In this case, it is better to purchase using a few more dollars that be confirmed with a quality product.

It is a very hard job to select the best quality products. For this reason, we have compiled lots of information using online research and made a list of 10 best quality CO2 diffusers that may help you to choose the best one.

Name of Diffuser

Suitable Tank Size

Product Dimensions

Our Rating

Price on Amazon

Up to 75 gallons tank

2.6 x 2 x 6.3 inches

Up to 50 Gallons

3.2 x 3.2 x 3.2 inches ; 0.64 ounces

Up to 20 gallons

4.4 inches x 2.9 inches x 1.7 inches; 0.8 ounces

Over 30 gallons

13.8 x 2.8 x 1.4 inches ; 5.6 ounces

15-50 gallons tank.

3.5 x 3 x 1.5 inches ; 0.8 ounces

Below 20 gallons tanks

0.8" diameter, 7.9'' long, 3.2 ounces

Up to 20 gallons

1.3 x 3.4 x 4.3 inches ; 0.64 ounces

Up to 75 Gallons

3.6 x 3.4 x 0.7 inches; 0.8 ounces

Up to 30 Gallons

.8 x 0.8 x 1.8 inches ; 0.32 ounces

Under 20 gallons

2.5 x 1.2 x 0.8 inches; 0.8 ounces

JARDLI Music Glass CO2 Diffuser

If you are looking for a diffuser for small or average-sized planted aquarium, then the JARDLI Music Glass CO2 Diffuser is the perfect choice for you. You can use it for up to 75 gallons tank. It is a very favorite for many tank owners due to its elegance and efficacy design.

It is made using high-quality borosilicate glass which makes the product is safe and durable to use for your tank. Its elegance design also makes it more visually appealing.

The Music Glass diffuser has high-quality ceramic membrane nano-holes with 2-inches diameter which can carry on to producing tiny bubbles that can equally spread the CO2 into your tank water which helps to mix with natural water flow. In this case, its bowl style design can easily break downs and dissolve up to 98% of CO2 which enhances the plant growth and health due to its sufficient CO2 supply.

I highly appreciate purchasing this device due to its easy to set up with no time at all. The device contains two suction cups and a stick that simply connects to the airflow pipe and to the side of the tank, respectively.

Caution to Use

Before using, tube, ceramic disc, or surfaces must be immersed in water for at least 30 minutes. To avoid damaging glassware, you should always wet the glass tubing before inserting the silicon or rubber tubing.

Pros

  • Aesthetically and visually it is very appealing.
  • Aesthetically and visually it is very appealing.
  • It is safe, durable, and easy to setup.
  • It is a super-affordable device that can disperse a tiny bubble of CO2 in a wide area of water.
  • It is made using high-quality borosilicate glass with high-quality ceramic membrane holes.

Cons

  • Sometimes it can block with algae.t
  • Care should be taken due to its little fragile glass.

STARSIDE Aquarium CO2 Regulator​

If you looking for the best quality CO2 diffuser that produces a constant stream of tiny bubbles, then STARSIDE CO2 diffuser is the best choice for you. It is made using the best quality resin glass that is resistant to bending and extremely durable. It looks crystal clear, nice, and aesthetically beautiful.

It works well due to its U-shaped feature and easy to install. It uses the ceramic disc to produce a constant stream of CO2 bubbles and diffuse the CO2 into the water more evenly by creating a tiny form of bubbles that enhances your plants' growth.

The most outstandingly, this awesome device can successfully diffuse CO2 inside the tank water and generates a nice-looking stream of tiny bubbles, as a result, the plants get more benefits to grow healthily and stay fresh. The plants also will be refresh and show their vibrant and brilliant colors. This also ensures very relaxing scenery at your home.

At the time of execution, you simply utilize the suction cup to connect it to the side of the fish tank and modify the U-bend as essential.

If you have a rimless aquarium, then the U-shaped section fits easily over the side of the aquarium while the U-shaped portion does not fit with a tank, the rest of the diffuser will still function by connecting simple tubing.

Actually, CO2 diffuser provides a sufficient amount of CO2 by making tiny bubbles that help your aquatic plants enjoy a safe and healthy environment inside the aquarium making the home eye-catching.

Besides, this device has a few drawbacks. Because it may create clog with algae and the ceramic disc is fixed permanently attach and does not remove for cleaning. In this case, it needs sufficient high pressure to allow successful flow.

As a whole, this CO2 diffuser for aquarium is great for the inexpensive price tag and reasonably functional and can guarantee to generate light and a foggy stream of bubbles that could assimilate properly with the aquarium water.

Pros

  • It is a new brand high-quality product suitable for up to 50 gallons tanks.
  • It has a U-shaped design that makes more aesthetically look.
  • It is made using high-quality materials that make it durable and long-lasting.
  • It can provide a safe and healthy environment for aquarium inhabitants.
  • It can diffuse CO2 more evenly into the aquarium water.
  • It is easy to install and operate.
  • The package includes diffuser, U-bend, and check valve.

Cons

  • The product does not contain a bubble counter.
  • Ceramic disc is fixed and permanently attach to the disc, as a result, it does not detach for cleaning.
  • It needs lots of pressure to make proper flow.
  • It may create clog with algae.

Rhinox Nano CO2 Diffuser​

Natural and live aquatic plants play an important role to make the healthy aquarium environment, as a result, all aquatic pets become happiest and more active. Plants perform photosynthesis for producing their own food using CO2 and release O2 into the tank water.

To produce more CO2 in the planted aquarium, CO2 injection is needed but it does not distribute CO2 evenly into the tank water. Therefore, the best CO2 diffuser is essential. In this case, Rhinox Nano CO2 Diffuser is the best choice for you.

It is a popular and well-known diffuser among the planted aquarium enthusiasts due to its high rating performance that is available in the pet fish business sector with a reasonable price tag. This device is constructed by the best materials using the latest technology as a result that ensure maximum functioning with their comfortable rhinox design and create a plant-friendly aquarium environment.

This awesome Rhinox Nano CO2 Diffuser contains fine, see-through glass which makes the device both visually unobtrusive and aesthetically fascinating.

It requires minimal parts and easy to set up, install, and activate with low maintenance. The device includes a suction cup that performs in sticking a diffuser to the tank wall. It is also well-suited with pressurized tanks that have a maximum capacity of 20 gallons. It is also compatible with DIY yeast bottles.

This diffuser provides immeasurable benefits for aquarium fauna and flora. Its high-performance, high aesthetic value with low cost makes the Nano CO2 diffuser most popular among the planted aquarium enthusiasts.

The Rhinox Nano provides CO2 using a diffusion system that makes the satisfaction of both plants and aquarium fish. Many aquariums contain insufficient CO2 which is not suitable for a planted aquarium. In this case, it is essential to add CO2 intake with maximal efficiency but minimal disruption to aquarium inhabitants.

As a whole Rhino Nano diffuser contains atomic pores on the surface of its ceramic diffuser disc which can break down CO2 into tiny bubbles. It can facilitate the CO2 bubble to bring about nearly 100% diffusion ensuring the rich growth of your aquarium plants. After all, it is the cheapest diffuser in the pet fish market that gives you great CO2 bubbles.

Pros

  • It is made using high-quality glass.
  • It is suitable for up to 20 gallons tank.
  • It is the cheapest diffuse that gives you more CO2 bubbles.
  • It is easy to set up and maintain.
  • It features U-band and tubes.
  • It is very popular among the planted aquarium enthusiasts.

Cons

  • It does not contain a valve.
  • It is not fit for the large-sized tank.
  • It has comparatively low power capacity than other devices.

Fibst CO2 Diffuser for Aquarium


Hi every planted aquarium pet fish lovers, if you are looking for durable and long-lasting Stainless steel made CO2 diffuser, then Fibst CO2 Diffuser is an excellent option for you. Because it is constructed by using 304 stainless steel instead of glass with a ceramic sheet that ensures a reliable and superior quality bubbler other than diffusers.

The kit is durable and lasts a long time in your fish tank. The great advantage of this device is that it is rust-proof or non-corrosive because it is made up of stainless steel.

Its elegant design adds more appeal to its overall look and it also shows highlight its capability to function as a dependable CO2 diffuser. It gives you a guarantee of a dynamic CO2 diffusion inside the aquarium water. It is a simple but elegant design that makes it extra appealing to look and you can freely choose from its three distinct sizes such as 20Dx350L, 30Dx300L, and 30Dx350L. It can produce all-round CO2 bubbles.

The device is easy to install and clean up. During installation, you just hook the diffuser above the edge of the fish tank and use the stainless steel fixture to make safe it.

If you purchase this kit, you will get one stainless steel CO2 diffuser with one stainless steel fixture. In this case, the stainless steel tube is of 5mm diameter. Besides, they also provide you a 6-month warranty for ceramic sheet and 24-month warranty for other parts. You will also get non-stop friendly customer service if needed.

Besides the above features, it has a few drawbacks. Because it is designed with tiny CO2 diffuser surface area and it is not equipped with a furnished flow control valve. It also does not contain a bubble counter or check valve.

Pros

  • It is made using top quality stainless steel materials which make the product durable and long-lasting.
  • It is easy to install and clean.
  • You can easily replace the ceramic disc.
  • You will get a 6-month warranty for disk and a 24-month warranty for other parts.
  • It is a simple but elegant design makes it extra appealing to look at.
  • It is rust-proof or non-corrosive.

Cons

  • It does not contain a flow control valve.
  • It does not include a bubble counter or a check valve.
  • It is not suitable for tanks over 30 gallons.
  • The diffuser tiny CO2 surface area is small.

Yagote CO2 Aquarium Diffuser

Hi, friend if you are looking for a budget-friendly CO2 diffuser for your aquarium, then Yagote CO2 Aquarium Diffuser is the right choice for you.

It is a well-known high transparency premium quality and high-performance product. It has a stunning spiral design with a fine and beautiful see-through glass that makes the product a more elegant look. The surface of the ceramic diffuser disc contains minute pores that are capable of producing tiny CO2 bubbles. These bubbles can move up steadily which can ensure efficient diffusion of CO2 inside the aquarium.

This device is constructed using high-quality glass materials which ensure the longevity of the product to prevent from broken of damages.

It is an awesome and high profile device that can produce rich CO2 which is essential for the proper growth of plants and ensures sufficient nutrition and health of hydrophytes. This makes the friendly living environment for aquarium inhabitants.

This kit contains a suction cup which is firmly fixed with the fish tank. It is easy to install and operate and you can easily adjust the position instantly. This device is easily compatible with a pressurized tank that ranges from 15 to 50 gallons.

It is recommended that if CO2 cannot be diffused smoothly or if you observe 2-3 big bubbles per second produce only a few tiny bubbles which means that the kit does not work properly. In this case, the first time you feel free to contact the sellers and send the product for a new one.

If you purchase this product, don’t worry, they provide a guarantee with service continuously.

After all, all the planted aquarium owners use this high-quality CO2 diffuser because it ensures high performance and super quality tiny bubbles productions. 

Besides, it has a few negative features. It is a glass constructed kit and it must be handled it with more caution due to its fragile behavior.

Pros

  • It is a budget-friendly CO2 diffuser.
  • It is made using a fine and beautiful see-through glass that makes the product more elegant look
  • It is well-known premium quality and high-performance product.
  • It is well-known premium quality and high-performance product.
  • They provide a guarantee with free service continuously.
  • It is easy to install and operate.
  • It is suitable for a 15-50 gallons tank.
  • It is suitable for a 15-50 gallons tank.

Cons

  • It is breakable and handles with more caution.
  • It features a tiny ceramic disc size.

JARDLI Glass CO2 Diffuser

Live aquatic plants living inside the tank make the aquarium environment attention-grabbing. When plants come in a sufficient amount of CO2 with other nutrients then they show modest growth with vibrant colors. To make your planted aquarium awesome centerpiece at home, you should make a smart decision to purchase superior quality aquarium diffuser.

I think JARDLI Glass CO2 Diffuser is the best option for you because it offers the correct amount of tiny bubbles of CO2 which encourage your aquarium plants’ healthy growth and fast proliferation.

It is the unique U-shaped hanger style diffuser with 0.8 inches diameter and 7.9 inches long. It is designed for nano tanks i.e, perfect for below 20 US gallons tanks. If you add this diffuser in your tank that enhances the aesthetic beauty of the aquarium and makes the brilliant centerpiece at home.

This device is equipped with a ceramic disc that contains very tiny pores which break down the CO2 gas into lots of tiny stream of bubbles. Most of the nano tank owners prefer this diffuser due to its awesome performance. Because it can break down the CO2 into tiny, light streams of bubbles. It also features an elegant style that adds more wonderful aesthetics for the aquarium.

It is made using high-quality glass that looks bowl style which can dissolve up to 98% of the carbon dioxide (CO2) running through them. It can create correct pressure that capable of diffuse in a very light and fantastic bubble stream.

This diffuser requires standard 4/6 mm CO2 tubing. In this case, you can use silicone or rubber tubing that should be kept into boiling water for 30 seconds or 1 minute before inserting the tubing to CO2 diffuser. If you keep it in boiling water which makes the tubing soft that helps easy to install.

It is recommended that if your diffuser does not function correctly than the new one then you should keep the device in bleach water for 15 minutes and wash it with water and immerse for 30 minutes to reach the normal function.

As a whole, JARDLI Glass CO2 Diffuser functions wonderfully in your fish tank that provides the sufficient amount of CO2 that is needed for your plants and helps to flourish and stay in good plant health inside the aquarium.

Pros

  • It features a high-quality ceramic membrane.
  • Tiny pores of the ceramic disc break down the CO2 gas into lots of tiny streams of bubbles.
  • It is suitable for up to 20 gallons of the fish tank.
  • It is made using high-quality glass.
  • It looks bowl style which can dissolve up to 98% of the carbon dioxide.
  • It provides the correct amount of tiny bubbles of CO2 which encourage your aquarium plants’ healthy growth and fast proliferation.

Cons

  • It is not suitable for more than 20 gallons tank.
  • It should be handled carefully due to its little fragile.
  • Incapable of fitting standard tubing.

Fluval Ceramic 88 g-CO2 Diffuser

Hi everyone you are looking for CO2 diffuser for smaller sized fish tanks, then Fluval Ceramic 88g-CO2 Diffuser is specifically recommended for you. This device provides a suitable amount of CO2 supply to the aquarium plants and a variety of fish species to flourish. It ensures a healthy environment by providing a proper amount of CO2 for fish and plants.

It has a round plastic body which surrounds the ceramic disc. It looks like a black donut or tire that can be attached to the side of the tank with a suction cup. The top of the tire contains a small nipple where you can attach the CO2 line.

You can easily hide it behind some plants at the back of the tank due to its simple and small size body.

It is a very essential device that you can purchase to diffuse CO2 for your fish tank because it provides lots of benefits to your aquarium inhabitants and also ensures an undisruptive healthy environment for them. Besides, this device is the perfect choice for you because it produces the correct amount of tiny bubbles of CO2 in tank water and makes your aquarium dwellers safe at all times.

After all, if you want to purchase the Fluval Ceramic 88g-CO2 Diffuser, firstly you have to make sure that it is the right fit for your fish tank then should pick this perfect device for you. You have to make the decision to install the device in such a place as the tank that makes a clean, safe, and healthy environment inside the tank for your pets.

Besides the above features, it can make a great motivator for algae growth inside the tank. As a whole Fluval CO2 diffuser is a remarkable device that can capable of supplying the sufficient amount of tiny bubbles of CO2 for your aquarium that ensures the optimum growth of your plants inside the tank.

Pros

  • They perform to supply an appropriate amount of CO2 in the aquarium.
  • They provide a healthy environment inside the tank that makes your aquarium inhabitants happy and healthy.
  • It is made using the best quality round plastic body with the ceramic disk at the center.
  • You can set up it anywhere in the tank.
  • It is suitable for up to 20 gallons of fish tanks.
  • It is simple to install.
  • It does not break easily due to its plastic body.

Cons

  • It can prone to clog.
  • It encourages instant algae growth..
  • It is not perfect for bigger tanks.
  • It does not come with a bubble counter, a U-bend, or a check valve.

Pm0606 Micro CO2 Bubble Diffuser

If you are looking for micro-fine bubbles producing diffuser then Pm0606 Micro CO2 Bubble Diffuser is the handsome choice for you. This device is constructed by expert engineering formula using high-quality equipment. It can create a stable and good ecosystem for your tank inhabitants and also make the aquarium centerpiece at your home.

It features a cost-effective ceramic disc which performs optimum diffusion and produces tiny CO2 bubbles in the aquarium. It is durable, long-lasting, and easy to set up.

It comes in two sizes in the market with a sensible price tag. Among the ‘S’ size is appropriate for the mini-sized planted tank while ‘L’ size is perfect for big planted tank those are very effective at creating a large number of bubbles on a wide, distributed surface.

Pm0606’s product is made with high accuracy to provide suitable environments for aquarium plants with other inhabitants such as guppy, tetra, betta fish, shrimps, and so on.

This device also features an air control valve that helps in regulating the amount of CO2 gas into the tank and also maintains the size of the bubbles being produced.

This device does not include tubing which is required to connect the device with the fish tank. It is durable and long-lasting and is made using strong glass that won’t break easily.

The device contains 100% washable components that require regular cleaning for functioning properly. It is easy to clean, set up, and easy to maintain. As a result, you can be used over and over again without needing to replace it.

You can purchase this awesome device with 100% confidence because it is made by the remarkable and renowned company. If you do not glad about this device for any reason, you must inform the seller and their buyer service team will without delay solve the issue or they return you 100% cashback.

This kit is also designed with a bubble counter that can calculate the bubble via a clear Acrylic cylinder which is suitable to maintain the CO2 dosage. It is also perfect for both high and low CO2 pressure.

Pros

  •  It is fit for both plants and fish.
  • It can create micro-fine bubbles for maximum CO2 absorption.
  • It features an air control valve for regulating CO2 release.
  • It is available in 2 sizes (up to 75 gallons) such as S for small tanks and L for larger tanks.
  • It is easy to clean and maintain.
  • It also features a bubble counter.

Cons

  • The kit does not include the required tubing.

ST International Aquarium Glass Diffuser

If you are looking for CO2 diffuser for a small-sized planted tank, then the ST International diffuser is a good choice for you. It is made using high-quality material that can last for years if you use it with much care. It can diffuse optimum CO2 and break down into a fine stream of bubbles that are easily dispersed all over the fish tank and keep your plant green and thriving.

The kit features a simple and small glass design. You can easily fit into a small-sized tank by getting special benefits without taking up too much valuable space inside the tank.

It is very effective and inexpensive for the price that can offer a sufficient amount of CO2 to your planted tanks and ensures even distribution of CO2 inside the tank. It is easy to use and operate. Cleaning and maintaining this kit is also very easy for you to deal with.

To make beautiful and vibrant aquarium plants this diffuser does a fantastic job by providing the necessary amount of CO2 which especially require for surviving the plants and other organisms inside the tank for a long time.

The ST International Aquarium Glass Diffuser has unbelievable capacity to split CO2 bubbles into the light, tiny and fine stream of bubbles. It also instantly dispenses the tiny bubble of CO2 all over the fish tank, as a result, the plants get the necessary amount of CO2 which helps them remain alive and healthy life at all times providing your aquarium eye-catching and vibrant colors to everyone.

The kit includes a suction cup which is needed to attach the diffuser to the wall of your tank, and also connects your pressurized CO2 system.

Besides the above features, there are two weak sides. Firstly, it someway produces audible sounds but it does not create annoying. Secondly, it is a little fragile because it is made of glass material. If you handle carefully, don’t worry it can last for years.

Pros

  • It is suitable for up to 30 gallons tanks.
  • It can diffuse an optimum amount of CO2 sufficient for your plants.
  • It is made using durable and solid materials.
  • It is easy to operate, clean, and calls for low maintenance.
  • It can provide maximum carbon dioxide dispersion inside the tank
  • List Element
  • List Element

Cons

  • It someway produces audible sounds.
  • It is a little fragile because it is made of glass material.

Bluecell Aquarium CO2 Regulator

The right level of CO2 promotes healthy aquatic plants with vibrant colors. In this case, the best CO2 diffusers play an important role in the correct amount of CO2 delivery. If you ensure to provide the right amount of CO2 supply inside the aquarium and keep the plants and fish alive, fresh then you have to use the best CO2 diffuser. In this case, Bluecell Aquarium CO2 Regulator is the perfect option for you. Because this device can deliver suitable air pressure with the correct amount of CO2 to the aquarium. It features a high bending resistance with a built-in bubble counter.

Bluecell Aquarium CO2 Regulator is made using high-quality glass that looks crystal clear making the aquarium gorgeous and eye-catching centerpiece at home.

It has a U-shape connecting tube that can keep away from the blockage of CO2 flow. By providing sufficient CO2 supply it improves the growth and health of your plants.

It also features a built-in bubble counter which can provide a dependable function. It also functions high-handedly by distributing a tiny bubble stream of CO2 inside the tank and creating a sound and safe heart for both fish and plants.

This diffuser is available in the pet fish market with an inexpensive price tag but it functions as like that other expensive models. It does not easily bock the flow of CO2 as compared to other models.

Besides the above features, it is made of glass material that makes the device a little fragile. In this case, if you utilize it with extra caution then it lasts for a year.

It also comes with frail built air hose and you also need to extra careful when inserting the air hose otherwise it can break easily if too much pressure was exerted.

Pros

  • It does not block the CO2 flow.
  • It is designed with a sturdy and useful built-in bubble counter.
  • It can create a healthier habitat for both plants and fish species inside the tank.
  • It looks crystal clear making the aquarium elegantly-appealing.
  • It is easy to install and clean.
  • It can distribute a tiny bubble stream of CO2 inside the tank.
  • It features a high bending resistance.
  •  Inexpensive to purchase.

Cons

  • It is made using thin glass material, extra care should be taken during handling.
  • It is slightly difficult to insert the air hose.

Benefits of Plants in Your Aquarium

  • Plants make available more oxygen for the beneficial bacteria and convert ammonia into nitrite and nitrate. So the beneficial bacteria help to create healthy the ecosystem in your aquarium.
  • If you plant multiple plants in your fish tank, fish become happier, safer, and less prone to stress.
  • If you plant multiple plants in your fish tank, fish become happier, safer, and less prone to stress.
  • Plants also protect the fish fry, eggs, and small fish to make hiding space that prevents from eating by the parents.
  • Plants increase the level of O2 in the tank water and consume the waste products created by fish by reducing ammonia releases when organic waste decomposes.

Role of CO2 in Planted Tank

CO2 is an important chemical substance that is needed for the proper growth of the plant. If you keep a lot of plants in your aquarium, you need more CO2 because normal amounts of CO2 provided by fish which is not sufficient for plant growth. CO2 works with the presence of light. If you give more light, the more CO2 is required for the process of photosynthesis to produce plant’s food which enhances the lush growth of your plants.

The plant normally needs 8-20 mg/L CO2 as an ideal dose. You should maintain the proper level of CO2 for your live plants. In this case, you should test the level of CO2 using a simple CO2 testing kit. If the level is not sufficient then you have to add CO2 from outside until reaching the appropriate level.

In many cases, pH and alkalinity influence the level of CO2. If your tank contains an appropriate level of alkalinity (90 mg/l) then the slow addition of the CO2 will also lower your pH. In this case, you should check the level of pH and alkalinity regularly when dosing CO2.

Sometimes excess pH can lead to fish defenselessness, diseases, and enhance to create algal growth. In this situation adding CO2 in your aquarium is required. Many aquarium enthusiasts use planted tanks and add CO2 to make the aquarium plant stunning. As a result, they strictly monitor the pH and alkalinity level of the water to determine how much CO2 you need. But your tanks have soft acidic water then adding CO2 is not required.

The planted aquarium requires good lighting with CO2 that should be 1-2 mg/l during the photosynthesis period per hour. The aquarium gets indoor air with 1-3 mg/L of CO2 while the aerated water can dissolve only 0.7 mg/L of CO2 that comes from the air. In this case, CO2 fertilization is essential for optimum plant growth.

For both fish and plants, the level of O2 does not drop below 5 mg/l. If the level of O2 drops below 2 mg/l which can cause harmful for fish. If you appropriately maintain the CO2 level in your fish tank which does not affect the fish. If your tank contains the heavy stock of fish then the level of O2 can fall below the acceptable level at night. In this case, tank owners use an aerator to improve the O2 level by removing excess CO2.

Sources of CO2 in Water

There are many possible sources of CO2 in the aquarium:

  • During photosynthesis one-fifth of the CO2 assimilated by the plants and remaining that returns back to the water.
  • Fish also releases CO2 into the water during respiration.
  • Bacterial oxidation of dead plant material releases CO2 into water.
  • In many cases, decorative wood also releases CO2 into the aquarium water.
  • A fully mature biological filtration system produces one gm of CO2 per 24 hours by using one gram of dry fish food that added to the aquarium.
  • For optimum growth of plants need CO2 15 mg/L but an effective amount of CO2 should be between 10 and 35 mg / L.

CO2 Regulator System

For keeping an appropriate amount of CO2 in a fish tank, a CO2 regulator system is needed. A CO2 regulator system consists of a CO2 diffuser and a CO2 cylinder. If you increase the level of CO2 in your fish tank, you should take an appropriate plan to maintain a suitable CO2 level otherwise it can be dangerous to your aquarium inhabitants and must be used appropriately.

Today, many aquarium enthusiasts use different CO2 equipment to deliver CO2 for their planted aquarium. To supplement the CO2 into a fish tank, there are many ways. These ways make differ in price, success, difficulty: They can be broadly categorized into the following types:

Yeast-based CO2 supplement

This type of CO2 supplement system is the most efficient but is an unmanageable way of getting CO2 into your planted tank. In this case, CO2 comes from the by-product of the fermentation process of yeast but is not sufficient for your plants.

Pressurized CO2 systems

It is the best process to deliver the CO2 into your planted fish tank. This system is reliable and provides a constant supply of CO2 but it is more expensive. It needs 1-5 liters bottles which is suitable for various sizes of the aquarium.

In this system, pressurized bottles and electric solenoid valves are required which allow the CO2 to only enter into the aquarium during the day. It also helps to stop pH swings during the night that can be harmful to your aquarium fish. To get accurate and the best result, it should be allowed to tune an exact CO2 output. It does not deposit any scum on your diffuser. To correctly set up, you need to a diffuser, needle valve, and. bubble counter.

DIY CO2 Supplement System

It is the most successful method when it is properly executed. It is made using very cheap materials such as bottles and home-made everyday used hardware.

In this system, DIY CO2 will make a layer of slimy substance to form on a typical diffuser. It is a very popular and successful method and a cost-efficient CO2 dosing system. It is easy to set up but needs to refill each week.

Liquid CO2 Supplement System

In the market, CO2 is available in a liquid form. Among them, Seachem excel is the well known liquid CO2 supplement. Besides, other forms of liquid CO2 are also available in the pet business sector. Actually, they are not an ideal substitution of CO2 dosing into your aquarium. It is cost-ineffective in contrast over time.

It is suitable for small-sized tanks that have lower light tanks with lower carbon dioxide (CO2) utilization requirements. It is easy to utilize in small tanks and can help to control the algae growth under lower light fish tanks. It has few drawbacks because that requires steady fine-tuning.

CO2 Tabs Supplements

In many cases, some aquarists use CO2 tabs to supplement the CO2 in a fish tank. It is inefficient and ineffective for the larger tank but a suitable source for the smallest tanks. It is easy to utilize but not appropriate for long term operation.

Electronic CO2 Supplements

Many aquarists use electronically generated carbon dioxide (CO2) to the fish tank. It is suitable for only the smaller tanks. If you supplement a higher level of CO2 in your tank it will make cost-effective compared to other systems. In this system, carbon inserts to electrolyzed to make CO2 into the fish tank.

To continue producing CO2, it needs refills which become fairly expensive for each device. Hence electronic carbon dioxide (CO2) generators are not a good solution for long term utilization.

Definition of CO2 Diffuser

The diffuser is actually a separate part of the CO2 regulator system which is attached to the tubing that connects at the bubble counter of the CO2 regulator. The other end of the tubing is attached to the diffuser for better performance of CO2 utilization.

The main function of the diffuser is to dissolve the CO2 into the aquarium. In this case, the CO2 diffuser plays an important role to break down big bubbles into tiny bubbles that are created in the bubble counter and make the small tiny bubbles which dissolve more easily and efficiently into the fish tank, as a result, the level of CO2 raise in the aquarium water.

It is recommended that you should purchase the harder, thicker, and more durable tubing otherwise you will face unwanted situations or accidents due to breakage or leaking.

There are different shapes and sizes diffusers are available in the market at a reasonable price. Among them, some come in spiral shape which is also known as the baffle system. In this system, it makes delays and regulates the injection of CO2 into the water. There are another bell-shaped diffusers that diffused the CO2 in the best way. Besides, a special type of CO2 diffuser is also used which helps to lower the pH levels of the water. This system is usually utilized in the saltwater aquarium for coral that needs calcium injections.

Types of CO2  Diffusers

There are many types of CO2 diffusers available in the market at a reasonable price. They have various shapes, sizes, and are made up using materials like plastic or glass.

It is an add-on device and almost all are submersible in the fish tank but few are kept in the outside place of the aquarium. In this case, it supplements the dissolved CO2 enriched water into the fish tank. In the pet fish market, the following types of diffusers are found:

Airstone Diffuser

It is one of the least efficient CO2 diffusers. It is not highly recommended to use because it produces quite big CO2 bubbles that do not easily dissolve into the aquarium. So you should avoid purchasing this type of CO2 diffuser.

Ceramic Glass CO2 Diffuser

It is a very common CO2 diffuser that is suitable for use in a small-sized fish tank. You can place it in the submerge condition in the fish tank. It is safely secured to the aquarium glass with the aid of a strong suction cup. This type of diffuser can produce very tiny bubbles that can easily dissolve into the water. This type of diffuser is sold in the market with a relatively cheap price tag.

Ladder CO2 Diffuser

It is a ladder-shaped diffuser which gives the common name ladder diffuser. It is specially constructed for use in a small-sized fish tank. It can work proficiently. It is available in the pet business sector with a very pocket-friendly price tag.

In-line CO2 Diffuser

It is another type of CO2 diffuser. It is suitable for a large-sized aquarium that contains many gallons of water. This diffuser is commonly connected to the fluvial canister filter. It is highly recommended you purchase due to its good reputation.

They are quite efficient, safe to use, and very effective. Because of the CO2 that enter the water and having a lot of time to break down CO2 bubbles, you save money on CO2 utilization.

CO2 Reactor

It is a very popular diffuser but very expensive to purchase. You can use it for really very large-sized aquariums. It is very much functional for use and it can perform to provide the highest output of carbon dioxide (CO2) that makes the balanced environment into the aquarium, suitable for all the aquatic inhabitants.

The Benefits of Using Carbon Dioxide Diffuser

  • Carbon dioxide diffusers can deliver sufficient CO2 into the aquariums which promote faster growth for all types of aquatic plants inside the tank.
  • This device is not expensive to buy than other equipment.
  • Carbon dioxide diffuser is typically easy to use and operate.
  • Its maintenance does not create any trouble.
  • If you use carbon dioxide diffuser then you can utilize or add various kinds of plants in the aquarium.
  • CO2 diffuser provides tiny CO2 bubbles of the stream into the tank water that offers optimal results inside the tank environment.
  • The diffuser helps to work in part by expanding the water surface area exposed to the gas.
  • Diffusers break down the big CO2 bubbles into tiny bubbles into the water and disperse it into the aquarium more successfully and without much great effort.

Concluding Remarks

Fish always exhale CO2 through the process of respiration, as a result, a certain level of CO2 always exists in the fish tanks; actually, it is not enough for plant growth. In this case, tank owners mechanically add CO2 to the planted aquarium.

Generally, plants prefer 10-15 mg/l of CO2 and it should be kept always constant otherwise high dose of CO2 could harm your fish and other tank inhabitants.

Besides, a continued depletion or low level of CO2 can also cause many health effects such as stunted growth, paling in the leaves and stems, etc and even death of your plants. Finally, fear of algal growth with increasingly low CO2 levels can also cause a lot of other problems including ammonia poisoning.

Basically, the CO2 diffusers are one kind of add-on device that performs to dissolve the CO2 efficiently in aquarium water. Actually, diffusers break downs the big size CO2 bubbles into tiny bubbles that are suitable for equal mixing into the water. If you directly inject the CO2 into water that does not readily and optimally mix with water. Hence, you should use the best CO2 diffuser to make a healthy aquarium environment.

Click Here to Leave a Comment Below 0 comments

Leave a Reply: