Hi all. Any help wold be appreciated! My blue zebra (I think that's what he is) is sitting on the floor of the tank kind of laying on his side. I know that about 5 days ago he got in a lip lock with my red zebra. Since then I haven't seen him much. Yesterday we changed water and vacuumed gravel so he had to come out of his cave. This morning I got up and he is sitting on the bottom of the tank kind of on his side and is obviously very distressed. His lips do look a little red. Think it could be an infection from the lip lock? Or some kind of disease? Other than the reddish lips he has no other wounds or signs of any disease...Any have suggestions? Don't want to loose him!! Thanks...