all i have is a aqua-c skimmer and hang on filter for crabon three power heads two up top one below blowing behind the rocks no sump/fuge dont use.. one water change i do one big one a month i think is better than a bunch of small ones a month..The only think i dose in the tank is iodine coral.accel and strontium ones a week and calcium if needed and dts once a week for the corals..