Reusable 300 Quantum For aquariums up to 300 litres The Set consists of: - Refillable 500g reusable CO2 supply cylinder with stable safety stand. - CO2 Evolution Quantum Pressure redugulator. - CO2 Flipper diffusor. - CO2 hose 2m - Special CO2 check valve. - CO2 Softflex hose 2m - CO2 long-term test Correct + pH - Special CO2 indicator. - Spanner. - Allen key. - Perfect Plant System.