Max Pond Vol (Light Stock): 4500gls/20000 lts - Max Pond Vol (Standard Stock): 3000 gls/13500 lts - Max Koi Load 1% Feed Rate:1.0lb/ 45 kg - Max Feed Rate Per Day: 1.0 lb/450 gm - Max Rec Flow Rate: 1000-1500 gph - Size: 1.25cm High x 0.50cm Dia -The max Head of pump at least 2.0m more than working head or exceed 4.0a