I feel soooo stupid, I don't know how I did this but I feel the worst. I have had fish for the past 25 years so it's not like I don't know how to take care of them. We recently did my floors and had to empty out my 50 gallon tank which was full of beautiful tropical fish. well yesterday I refilled the tank with the fish in it, with regular HOSE WATER and didn't give it a second thought!!! For those of you who own fish know that the water must sit at least three days to let the chlorine out, I went to get my MRI done and when I came home most of my fish where belly up. I felt so stupid, I killed my fish without a second thought, I was crying inconsolably because I felt so guilty. with hubby's help I rushed to save the few that remained and this morning only a few of those survived, this lupus fog is no joke. I wonder how dangerous this can become?