Well, I took my water up to PetCo and they tested it and said it was fine. The girl was obviously not very knowledgable though because she told me I could only get 2 goldfish for my tank. Any others need heated water. I told her I had a heater and she said oh, well we don't recommend heating water under 10G because you will cook your fish. Obviously if tanks under 10G weren't meant to be heated, they wouldn't make heaters for UP TO 10G...anyway, I picked up 4 neon tetras. I think I am going to try to find a LFS instead of a chain although I've never seen any around. I will look harder.