I have 2 Maxi-jet 1200's in my 72g. Theres a mod kit out on the market but imo theres better powerheads out there that are just a little more money. Maxi-jets have a high flow and definetly a upgrade from a powersweep. the only thing i dont like about the Maxi-jets is you dont get a large area of water flow. better put, it pumps alot of water but it's a small stream. were as most of your better powerheads pump over a larger area of water and you dont get as many dead spots for algea to grow and you dont get really strong currents in some areas and very little current in others.