hey guys, I'm posting this for my brother. He has had a 15 gallon FOWLR for about 3 years. he has a HOB filter, about 15lbs of LR, LS. He has three fish in it right now, 2 clowns and a dottyback. He just recently added a 10G sump with a protein skimmer. the sump pickup in the 15 also has a...