I would give it another day or 2 to see if it gets worse. If it does, assuming it is a "fungal" infection, you might have to start using gram negative anti-biotic to treat the injury while treating for ich (heat and salt). These medications won't hurt your beneficial bacteria. If you decide to medicate,
I'm worried he won't last two days. Yesterday he looked worse, his lip was red and he was doing that thing where he aimlessly swims around and hits his mouth against everything
