Originally Posted by unknown
But how could he possible get that wound? and btw i have live plants in the tank, so the salt is not in the picture. But i can isolate the fish in separately tank. How much salt should i let in per gallon or liter?
Flashing can cause it, which a sign of a possible parasite like ick. My big Moor comes up with small sections of scales missing for no reason (nothing sharp in tank) and I just let it heal on it's own. Is there something sharp it could rub itself against in your tank?
Melafix is a good healer (tea tree oil) that I've used with success. You can use salt in limited quantities with plants, but if you have a QT I'd suggest getting it in there so you don't have to deal with getting the salt out of your DT. If you read the link I posted, it recommends 1/2 dosing salt at 1 tbsp per 10g of water and Melafix over the course of a few days with PWC
Breeding is another area to consider, since they can get pretty rough when they're in season (my female got her dorsal fin ripped during breeding).