Ive already posted about this but i dont think it was in the right place and didnt get much help. I had 2 male guppies and 3 neon tetras in a filtered and heated 10gal. I had them in there for a few months, and all of a sudden one of the male Guppies (named Mem) has started attacking Rayble (the other guppy), I seperated them, but Rayble had torn fins. He swam on his side, but seemed fine other than that. But today, ive noticed his back is arched and isnt moving his tailfin, like its paralized. he can only move his pectoral fins but they arent in sync and dosnt help him move much, and he still is on his side. Ive put stresscoat in his water since hes now in QT. I had another male guppy in QT too that i was going to add to their tank. I had the new Guppy in a cup floating in the 10gal, and Mem tried to attack him through the plastic, so i decided to take Mem out of it and put him in a seperate tank. He never attacked any of the Neons though. Is there anything i can do for the nipped fish? Here are some pictures of what he used to look like and what he looks like now. The yellow one is him, and the orange one is the bully.