The Bio-CO2 Pro system combines the safety of biological carbon dioxide production with the convenience of pressurized delivery. 

Offering simplicity and unparalleled performance in an easy-to-use format, Bio-CO2 delivers reliable and controllable CO2 through the naturally occurring fermentation process. 

With safe, low-pressure operation, it is the most secure, simple, and environmentally-friendly aquarium CO2 delivery system available.

Features
  • Easy-to-use CO2 delivery system allows both new and experienced hobbyists to effortlessly grow and maintain vibrant live aquatic plants
  • Safe low-pressure operation – 1.3 bar / 19 psi max. vs. traditional high-pressurized systems (55-80 bar / 800-1100 psi)
  • Provides up to 30 days of reliable CO2 production through a naturally occurring fermentation process involving sustainable raw materials (sugar and yeast)
  • Recharging convenience – no refilling high-pressure cylinders
  • Quick 4-step process requires less than 10 minutes per month to maintain
  • High-quality stainless steel reaction chamber with 100% silicone gasket prevents CO2 escape
  • Adjustable bubble counter with precision regulator and nano bubble diffuser for accurate CO2 delivery
  • Pressure release valve for additional security and peace of mind
  • Starter Bio- CO2 Activator yeast and Booster tablets included – Refill Packs sold separately (#A8457)
  • System is compatible with CO2 level tests (sold separately)
  • Developed in Germany
  • For best results, add tap water with a temperature of 80 – 85 °F / 27 – 30 °C.
  • Recommended room temperature should be between 68 – 72 °F / 20 – 22 °C.
What’s Included with the CO2 Pro systems (the CO2 Indicator does not come included)
Stainless-Steel Reaction Chamber
Adjustable bubble counter with precision regulator
Nano Bubble Diffuser
Pressure Release Valve
Inline Check Valve
Gasket x 2
Airline with gas barrier (5 ft / 1.5 m)
Activator packet x 1
Booster packet x 1

What Makes Bio-CO2 Pro Better?

Bio-CO2 ProConventional Pressurized CO2Liquid CO2Conventional Biological CO2
FormatHigh quality stainless steel canisterPressurized cylinderLiquid bottleGeneric plastic bottle
Dosing ConvenienceYes
Long lasting (up to 30 days of CO2)
YesNO
Requires daily dosing
No
Lacks adjustable valve
Recharging ConvenienceYesNoN/AYes
ReliabilityEXCELLENT
Pre-measured dry components
VERY GOOD
Potential for CO2 leaks
GOOD
Inherent risk as it’s a Chemical compound
VERY GOOD
Dry components mixed as needed
SafetyLOW-PRESSURE
system with release valve
1.3 bar / 19 psi max.
Caution
Contents under HIGH-PRESSURE
55-80 bar / 800-1100 psi
Relies on consumer dosing accurately (many variables to account for)Low-pressure system, but no pressure release
Adjustable Bubble ControlYesYesN/ANo
CO2 Level Test CompatibleYesYesNoYes

CO2 Specifications

Model 125Model 250
Ideal Bubble Count12 Bubbles/min.24 Bubbles/min.
CO2 Output (Monthly)90 g / 46 L180 g / 92 L
Activator Sachets / Booster Tablets Required (Monthly)1 of each2 of each