Max Pond Vol (Light Stock): 9750gls/44000 lts - Max Pond Vol (Standard Stock): 6500 gls/29000 lts - Max Koi Load 1% Feed Rate:200lb/90 kg - Max Feed Rate Per Day: 2.0 lb/900 gm - Max Rec Flow Rate: 3250 gph - Size: 1.25cm High x 0.50cm Dia - The max Head of pump at least 2.0m more than working head or exceed 4.0m