Ok, my rbp have been acting fine in their 75g tank. The water conditions are fine. The temp is at 80 degrees. I have noticed that the eyes on my fish have been getting bigger. But I looked at some pics on the web and it seemed normal. So I come home today to find that one of my rbp has what looks like a bag of pus above one of his eyes. I am including some pics so as to insure proper diagnosis. He acts fine, swims, and eats. Maybe he just bashed into something. This is the only problem and I did not see this yesterday. Any help would be appreciated. Thank you all!