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FZONE 5.5L Aquarium CO2 Generator Kit
The large-tank DIY generator: a 5.5-liter version that runs longer between refills for a bigger planted tank, with the same regulator, diffuser and solenoid, for keepers who want CO2 without a pressurized bottle.
79/ 100 T&T score
Ranked 5th of 6 co2 systems
Owner rating4.2★ (1,005)
Best price today$129.99
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Score breakdown
CO2 Delivery80
Control & Stability76
Build Quality80
Owner Satisfaction82
Value74
What we like
- +Larger 5.5-liter chamber runs longer between refills
- +Suits a bigger planted tank with no gas cylinder
- +Complete kit with regulator, diffuser and solenoid
- +The most-reviewed DIY generator here
Watch out for
- −Bulky chamber takes cabinet space
- −Output drifts more than a pressurized setup
Specifications
TypeDIY generator
Capacity5.5 L
SolenoidYes (12V DC)
RefillCitric acid + baking soda
IncludesRegulator, diffuser, tubing
Best ForLarger tanks without a cylinder