I agree on Aquatic Warehouse. STAY AWAY FROM FOUNTAINS!!!!! They have serious parasite problems in many of their tanks almost all the time. I keep trying to give them chances, but they never improve the quality of care they provide their fish. Last time I was there, about 1/3 of their fish had ich, and several tanks looked like they were suffering from ammonia or C02 poisoning.
I would recommend Pet Kingdom and D&K aquatics for monsters. Aquatic Warehouse is mostly reef oriented with the occasional freshwater gem.