I have an established cbb, nothing new added to the tank in a long time and noticed these spots being more prominent over the past week. He's been in the tank for 6+ months and eats a ton. I read that this could be really bad for a cbb. Without nfg, what do I treat with? (assuming this is a bad infection). Near his tail, you can't see it well in the pics, it's a bit pinkish.