I only have a 20gal. I am new to the hobby but love it. I have only 10lbs live rock,2inch sand bed snowflake eel, 10 blue legs, 10 turbos, pepermint, 2 sallys, horseshoe, emerald, straberry hawiian crab,fighting couch,serpent star, blue hippo, tube annemon,huma huma, pencil cushion, lunar...