READ this !!! attn:will not work on multiple grill or screen intake AKA Volute screen intake you need the same intake you see on the video.this pump is 750watts if you run 24/7 you go broke but any way i already bought small one @ebay 150watts and run like almost the same .... male adapter,valve from home depot, bigger sump pump handles more water more air can produce... "NEW INVENTION" 3 in 1 water circulation, aeration/oxygen,protein skimmer my next project .... ................why mine not sucking air?.................... problem: a...you drill to big for tube connection / water still passing through... fixed: b... use teflon tape / silicon around the bolt thread problem: a...you drill to close to water outtake fixed: b...check the propeller turns / opposite side multiple grills intake --not going to work..period