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FZONE 2.5L Aquarium CO2 Generator Kit
The no-cylinder value pick: a 2.5-liter DIY CO2 generator that makes its own CO2 from citric acid and baking soda, with a regulator, diffuser and solenoid included. Good for a small to mid planted tank with no gas bottle.
80/ 100 T&T score
Ranked 4th of 6 co2 systems
Owner rating4.2★ (1,005)
Best price today$95.99
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Score breakdown
CO2 Delivery80
Control & Stability76
Build Quality80
Owner Satisfaction82
Value80
What we like
- +Makes its own CO2, no gas cylinder to buy or refill
- +Complete kit with regulator, diffuser and solenoid
- +2.5 liters suits a small to mid planted tank
- +Popular, well-reviewed DIY system
Watch out for
- −Output is less rock-steady than a pressurized cylinder
- −You rebuy citric acid and baking soda to refill
Specifications
TypeDIY generator
Capacity2.5 L
SolenoidYes (12V DC)
RefillCitric acid + baking soda
IncludesRegulator, diffuser, tubing
Best ForSmall-mid tanks without a cylinder