one of the fish has white spot and a mouth ulcer, his been a problem fish from day 1 always getting diseases. Water Stats are great, have put temp upto 28c, been using Myxazin only for a day, I would of bought some White Spot treatment but don't think my shrimps would of thanked me for it. Am hoping Melafix might help with the mouth ulcer, I know Myxazin is also meant for mouth ulcers but when I have used it in the past hasen't done much!