Hi its Mags....the one who didn't know the kind of adopted fish she had. Well I have had the tank for about 2 1/2 weeks. Its a 46 gallon. I have 4 neon tetras, 6 cherry barbs, 6 white clouds, 3 Platy's (well 2...I'll get to that), 6 (5...i'll get to that) Guppies, 2 Bleeding Heart Tetras, 1 Red eyed Tetra and a Pleco. Within the last few days the silk plants that I have in the tank are turning brown, so are the rocks and the front and side walls have lots of spots on them. This morning I woke to 2 fish that passed away. One was a Platy and one was a Guppie. I do not have a test kit and I plan to get one tomorrow. I was just checking on them and its strange but they seem aggressive. I hadn't ever noticed that and I do my share of tank watching. The white clouds are harassing a Platy.....I think they nipped her side fin darn near off. The cherry barbs are chasing each other and the neons. It just doesn't appear to be peaceful the way it has been. I obviously have a problem. I guess the test kit is the first start. Also the 2 remaining Platy's are hanging around the top of the tank....could they be trying to get air? I thought I did enough reading to prepare myself for fish ownership....but I feel like I was wrong. I have three dogs and I pride myself on caring for and loving them to death......this is stressing me out. Any thoughts? Comments? Words of wisdom?