I have a problem with one of my Trout. A few days ago I noticed its tail starting to go white. So I removed it from the rest of the trout and place it in an unused Aquaponics tank. Ammonia, nitrite and nitrate are all at comfortable levels. PH was at 6.6 but adjusted this to 7.Anyway as you will see by the picture, the whole till is now a swollen white. and the little bugger is having trouble swimming! This was the smallest fish in the tank and thought it mite be stress. Is this the case or is there anything i need to be worried about?
I didn't find the right solution from the Internet.