First off, I would have to defend my LFS, as these guys are a mom and pop operation that we have bought all our pet supplies from for years, way before i got into fish. They really do know thier stuff. Im sure they wont mind jotting down the parameters next time i got in. my LFS said its fine, but other times i go in to have it tested he will say something like "the nitrates are a little high, but not dangerous yet, do a water change within a few days." I have 2 undergravel filters and a penguin 200 filter with biowheel, the filtration is more than ample. fish are relatively diverse: 4 Serpae Tetras 1 Common Pleco 2 Emerald-Green Corys 2 Swordtails (red male and a black female) 1 Blue Dwarf Guarami 1 Ropefish and 1 African Butterflyfish (i realize i may be a tad overstocked but the butterflyfish, ropefish and placo are still small so i will either get a bigger tank as they grow or find new homes for them) i feed once or twice a day, always flake food or bloodworms with the occaisional baby brine treat. temp is 78-79 and i have a 20 gallon Long.