Frequently asked Questions about CO2, Diffusers, and Glassware

Here is a list of frequently asked questions about Carbon Dioxide diffusers, reactors, and glassware used in planted aquascaped aquariums.

How long will a CO2 bottle or tank last?

A 30 gallon aquarium consumes approximately 1/2 to 1 pound (.2-.5 KG) of CO2 in 1 month if CO2 is dosed only during the day. This will vary depending on the efficiency of the CO2 setup and the growth of the plants.

How often do I need to change the Drop Checker test fluid?

It is advisable to change the fluid in the tester every 4-8 weeks.

How often should I clean the diffuser?

Clean diffusers every 2 weeks or max 30 days. 

How do I clean diffusers and Glassware?

Always handle the diffusers carefully. Install and remove the tubing carefully, heating it with hot water as needed. Try not to touch the ceramic with bare hands.

Monitor and clean your diffuser regularly. Observe the performance and appearance of your diffuser. The in tank type CO2 diffuser should be cleaned approximately every 4-6 weeks, or as needed. Clean the in-line type diffuser approximately every 6 months, or as needed.

Clean diffuser carefully soaking and cleaning with mixture of 3 parts water to 1 part bleach. Never rub the ceramic diffuser part.

Leave diffuser or glass pipe to soak for 30 minutes.

Rinse diffuser carefully with fresh water, do not rub or touch ceramic of diffuser.  Soak the diffuser in aquaLife Dechlorit at triple dose in a small amount of water for a few minutes after rinsing.

It is convenient and recommended to keep two diffusers for the aquarium and rotate cleanings. This avoids any downtime.

How big a ceramic diffuser do I need?

Up to 6 gallons need ceramic diameter of 15-20 mm

Up to 18 gallons need 20-25 mm

Up to 75 gallons need 30 mm

Up to 100 gallons need 40 mm

Up to 150 gallons need 50 mm

Multiple smaller diffusers can also be used for larger tanks.  Inline diffusers (Atomizers) and reactors are also efficient for larger tanks.

CO2 diffusers and Inline diffusers or atomizers by UP Aqua
Turbo Diffusion are reactors that are highly efficient for larger aquariums or those with sump filters This is tip sheet for this unit

To learn about the premium Hydra Aquatics CO2 glassware with review see this article.

More Tips on CO2