Intex Krystal Clear Saltwater System with E.C.O. (Electrocatalytic Oxidation) for up to 15000-Gallon Above Ground Pools, 110-120V with GFCI Maximum pool size: 15,000 gal (56,800L). 110-120V with GFCI (Ground Fault Circuit Interrupter) Requires a filter pump with a flow rate between 700-3,000 gph (2,650 - 11,355L/hr) Chlorine output: 12 g/hr. 24 hour auto-clock cycle