I got a lemonpeel angel about 2 weeks ago and he's got a stange bump on his fin. it looks like a yellow bubble on the top of his fin. He eats fine, swims around, but I've seen him scratch some and the bubble has gotten somewhat larger. I can't get a pic to post. amm, trite, trate all tested 0. ph is at 8.3. my SG is around 1.020 but I'm gradually bringing it up.