Originally Posted by bstoll
i looked at the lump again this morning and it is turning white. does that sound like bacterial still?
It could be fungal, I'm no vet, but generally fungal are a topical/ surface infection. Bacteria likes to get inside from the out. It wouldn't hurt him to try some mild bacterial meds, see if that arrests it growing. I know you don't wanna take any chances, those are really cool and very expensive fish