Hi all. Sorry to bother you all. I've had my 320ltr tank set up for well over a year now. 3 black moors, and 2 fancies. The white one today, I noticed a wee growth on the side of his mouth. It appears white at the crown but the main part is pink pretty much. John, the large black moors has a whit mark next to his eye. I changed out the rocks last night (I have 2 sets on rotation for algae control). My normal routine of soaking in bleach overnight to kill algae, then soaking again overnight in dechlorinated water. I've done this routine for over a year with no problems. I'm hoping he's just gone a bit mental with his eating and may have cut his mouth but that's me being optimistic. Seeing as John also has a small amount of white on him, I'm a tad worried that there may be a bacterial or fungal infections in the tank. I've added a photo from my phone but should be able to get a better pic once the old dlsr is charged. Sakes. All this time, not a single ailment with my fish and then this pops up just as I'm about to crack open a bottle of vino. Any ideas much appreciated folks. Gaz.