Description CO2 fertiliser system for best feeding of fast and slow growing plants in freshwater aquariums up to 400 l (max. 120 cm) Assemble system, attach diffuser in the aquarium and adjust CO2 supply that way that the permanent test indicates optimum value Professional water care: precise dosing with pressure reducer. Even release, effective distribution due to extendable diffuser. Monitoring: bubble counter with backflow stop and CO2/pH test. Residual pressure display on pressure gauge Storage cylinder TÜV tested. No slipping of hose thanks to hose screw connection, check valve prevents water entering the cylinder Package contents: ProFlora u501, incl. disposable 500g CO2 cylinder, fitting, pressure reducer, diffuser JBL Taifun, bubble counter, 3 m special hose, backflow stop, permanent test CO2/pH, 2x 100 ml liquid fertiliser, 1x JBL daily fertiliser