As you can see from my sig, I have a small number of fish, but recently I started having problems. My oscar and the 2 pbass all have a pink sore on their bottom lip, and I can' figure where it came from. They are in a tank with a divider and are always rubbing their mouths against the divider, but can I be sure this is the problem? I haven't heard of any parasite or disease that affects only the end of the bottom lip, but I can't be sure. I posted some pics of my oscar on an earlier thread, and I'll try to get them on here. PLEASE help me....