i currently have a mixed tank of fish and corals that is about 95 gal. i have an overflow box on side of tank feeding the sump, it contains filter wool then the skimmer pumps over bioballs & ceramic rings then over a sand bed through base rock then to return pump. i have not experienced any major problems with fish or corals in the past 6 months, but do not like the overflow arrangement. can anyone suggest a better setup for my new tank, im open to all suggestions and like to get it right before i start :bigbounce :bigbounce