I have a copidachromis borelyi with a bump on his lip. He still eats and acts fine, but I had the same occurrence with a ps. acei that eventually died. Tank stats are 0,0,20ish. Temp 78. 20 male haps and peacocks. 2 50% WC a week, one with sand vac, the other draining from fx5. I haven't added any fish in awhile. Theres also a rena xp3 with the fx5. Any help would be appreciated. Here's a pic of said fish's mouth.
https://www.dropbox.com/s/llshhbfcetcc7hy/IMG_20160127_133645_463.jpg?dl=0
https://www.dropbox.com/s/llshhbfcetcc7hy/IMG_20160127_133645_463.jpg?dl=0
