HELP! Australian Rainbow split mouth
So, I've been upset lately with my male rainbowfish in my 48 gallon tank. I noticed him to be very sick 4 days ago with a deteriorating mouth, ich, and large bumps under his scales.
I started treating my tank for the ich first with ich attack, and now the ich is cleared up. However, his mouth has gotten even worse. I know for a fact that he's had what looks like an extra white lip protruding from his mouth ever since I purchased him at petsmart (maybe not so 'smart'). I noticed 4 days ago that his entire bottom lip split and the left side is deteriorating where this bump was.
I have also upped the tank temp to 82 degrees to treat the ich. I've done a little research, but it sounds like my rainbow has mouth rot! There is no fuzzy growths on him though so I've ruled out fungus.
I have no quarantine tank ATM and I'm going on vacation this week. Does anyone have any ideas on what I can do to save him? (besides euthanization)
Any tips greatly appreciated. This guy is my favorite fish in my tank.