Applications
NEO CO2 Refill provides 50 days supply of CO2 (depends on climate). Includes a Mini U Type Diffuser that produces fine CO2 mist into aquarium water for plant growth.
- Constant CO2 release
- Comes with diffuser
- Diffuser made of acrylic glass
- Produces finest CO2 mist
- Refill sets available
How It Works
MEP CO2 is a bio CO2 solution that features a longer reaction time with a more constant CO2 production compared to other CO2 solutions.
The sugar resides in a gel that forms inside the bottle, the yeast gradually dissolves the gel and the sugar in it from top to bottom. Depending on the temperature the yeast solution above the gel becomes inactive due to the increasing amount of alcohol after the reaction progresses.
FAQ
How long does the CO2 supply last?
The CO2 supply lasts for 50 days, depending on climate and aquarium conditions.
What material is the diffuser made of?
The diffuser is made of acrylic glass.
Is the CO2 release consistent over time?
Yes, the bio CO2 solution provides a longer reaction time and more constant CO2 production compared to other solutions.

Sonia Harris –
The CO2 refill works well for my planted tank. The mist is fine and steady. The diffuser is easy to clean and stays in place. I’ve used it for over 40 days without any issues. Plants are growing steadily.
Maria Peake –
Good value for the 50-day supply. The diffuser produces a consistent mist. I noticed a slight drop in performance after 45 days, but it’s still effective. Would recommend for beginners in planted tanks.
Jan Turner –
I’ve been using this set for three months. The plants have grown well, and the CO2 release is smooth. The acrylic diffuser is transparent and looks nice in the tank. No leaks or clogs so far.