I brought this guy home last week from the LFS, and He was fine no spots or anything. I had the rocks put in and things happen to start happening with him/her. It started with a big white scratch looking on its side ( From the top to the bottom of its side). so I let it go and now the white is gone and its turning in to a grey/brown color. There is nothing in the eyes, or the fins. I read everywhere and he has no symptoms. He eats well, he does not rub against rocks, he is not shy, he does not stay in the bottom or the top. The water perimeters are Kh-12.5 ph-8.1 ammonia-0.0 nitrite-0.0 nitrate- 30ppm ( It will go down tonight) Nobody else in the tank, No frags (not yet) I am thinking its just a battle wound with the lr i put in. Any thoughts?