Please help! About a month ago I posted about my platy and ended up euthanizing her cause it was said she had tb. I had a Cory die about a week later. I have another platy acting super weird and I thought I saw white near her rear end so I treated the whole tank with general cure last week. Did 2 doses, 48 hrs apart. Removed charcoal before hand. Did a 25% water change after and put charcoal back in. I also returned 2 clown loaches and got 3 more cories right before I did this (they were to big for my tank and I only had 4 cories so wanted the better school for them and figured if I was treating it was good to treat the new fish as well). I had one of my old cories die so that brought me down to 6. The platy is still acting weird and starting to get the sunken stomach I think. Both her and the one I was told had tb came from petworld and the same tank. Actually every fish in my tank is from pet world except one lol. A few days ago my blue moscow guppy started hiding and staying at the bottom of the tank. I found him between the glass and a rock. Thought he was dead went to get him out and away he swam. He keep going to the bottom and sitting though. I got him out and in a bowl. Then one of the new cories started floating upside down! I got him out and put him in the bowl too. He wasn't floating in the bowl when I left (have to get my mom from surgery) What am I doing wrong! I took them out cause I was told if they die in there and it's tb and the other fish nibble at them they can get it. I do a 25% water change every week. I am cycled and only clean my filter media in old tank water every few weeks. I use prime and stability. I'll test the water when I get home to check but the levels are always good and I use API water test kit. I feed flakes and pellets. Shrimp pellets for the cories a few a week and an algae wafer for a treat every few weeks. I have driftwood, Anubias, moss balls, fake plants and decorations, 2 air stones and 2 filters. I also have a glofish danios, guppies, snails, the cories, one platy fry a few weeks old swimming around in there and it is doing fine as well as the one platy I got from PetSmart in Jan who is bigger than anyone!