Just be efficient, one great filter is typically more efficient than 10 crumy ones same with lights, don't use 6 24 inch lights but rather one or two good 48 inch lamps. Heaters, I prefer to use more larger heaters so that I don't have one 75 watt heater pulling full for 30 mins at a time but rather a 200 watt on for 5 mins at a time. (I don't have any newer heaters so this might be an outdated tactic.) I notice that OTB are more effecient for the GPH than most canisters etc. Just some thoughts, put your lights on timers.