in my 20 reef i have an emperor 280, ac 50 power head, 100 watt jager heater, i also use live argonite sand and i have alot of live rock i have a actinic light along with another spectrum. i keep it lightly stocked. 3 green chromis, snowflake eel, and snails, hermits etc. i also have anemones and feather dusters, polyp coral, mushroom coral.