i got a 180 gal with 2 corner overflows. i got a mag 24 pumping up 15 feet ,right now . i want to get a good pump for my set up . i also have maxi mods on each side and i hate them . they are making a tornado in the middle of the take . i can see the bottom glass in the middle . i push the sand back and the tornado push it back . so i want to put more flow by the returns . so i need help finding a ideal pump and flow .