I bought 7 Neon Tetras about 2 weeks ago and they started dieing off in a week span. I would find a dead Neon Tetra everyday in the morning and take it out of the tank. This one time when I woke up at 8 in the morning I saw a guppy nipping at a dead neon tetra!!! Last Wednesday I found a guppy with a bent tail and a different day I found another guppy with a white patch on its back I put them in a small tank. I checked one of my Danios today and there is one that also started getting a bent tail. Both of the fishes with the bent tails were chased around a lot (The guppy is pregnant and the Danio is different from the others for having a brighter pink color). Is there any way to get the Neon Tetra Disease out of the main tank? I am also treating the fish in the main tank for ich. I heard that diatom filters can help but they are too expensive for my budget.