i have a 180 gallon with indos, mpwimbe fronts, and seveurms. filtration is 2 fx5 1 xp4 and a mega sized uv sterilizer. my fish seem to be floating on air the water is so clear. 50% water changes every week but evry 3 months i service and clean all my canisters AAARRRGHHHH!!!! ----these fx5 are the king of canisters but they are the heaviest things in the world to manuver and lift from underneath a stand..just venting 
