So I have a 38 gallon tank with 50 lbs of rock and 45 lbs of sand. I have 1 brittle star. 1 emerald crab. 1 pin cushion urchin. 7 hermits. 5 astrea snails 1 small turbo and 1 kinda bigger turbo. Is this overkill? And if so what should I get rid of. Alot of people say turbos eat alot but I read in a book that turbos are good for 1 per 10 gallons. But I would like opinions. I also leave lights on for 12 hours a day.