The easy-to-use CO2 supply system allows both new and experienced aquarists to effortlessly grow and maintain live aquatic plants. Safe low pressure operation - max. 1.3 bar / 19 psi compared to conventional high pressure systems (55-80 bar / 800-1100 psi). Provides up to 30 days of reliable CO2 production through a natural fermentation process using sustainable raw materials (sugar and yeast). Convenient recharging - no need to refill high pressure cylinders. Fast 4-step process requires less than 10 minutes per month for maintenance. High-quality stainless steel reaction chamber with 100% silicone seal prevents CO2 from escaping. The Bio-CO2 Pro system combines the safety of biological carbon dioxide production with the convenience of pressurisation. Offering simplicity and unrivalled performance in a user-friendly format, Bio-CO2 delivers reliable and controllable CO2 through the naturally occurring fermentation process. With its safe low-pressure operation, it is the safest, simplest and most environmentally friendly CO2 supply system for aquariums on the market.