I was at Petsmart today to get my guppies and I went home with 1 guppy and an algae eater. While the lady who worked there was getting my fish she stopped and said you should only get up to 4 or 5 fish at a time. I'd heard to get your fish all at once because if you don't you could bring home a sick one and kill the ones that you already have. My tank has sat for a week with everything in it. She said you should wait about 4 weeks until you get fish. She also said they could test the water the next time I came. So I just bought two fish. Now I have to go all the way back to Fairview Heights Il from Nashville Il to get the water tested. Then maybe I can get my fish, but I may have to go back yet again to get all the fish I was originally going to get today. Do you think it was bad advice, or is she right?