Just to update I have now done a 100% water change, and added just treated water, nothing else, no salt or melafix or anything. I thought best to leave him in plain water for now, unless I am told or advised differently by yourselves......I was going to see how he went with just the water for now, doing daily 50% changes, or a couple a day if the test readings require it.
Ammonia readings have been virtually non-existent since I have done 50% daily changes, but nitrites still rise a little, requiring sometimes two small changes a day, but only after about 4 days does it seem to rise quickly, it is then I do the larger changes.
His fins have definitely slowed down in progress, the worst loss was the first 5 days, after that it was just the appearance of black edges rather than loss. At first it looked like they were melting, small holes literally grew into missing pieces over hours and days, that has stopped. His fins look a little thin in places, but no more holes. There are a lot of black edges now though, they are still there and not going........it is literally on just the tips of almost all the rays, and on edge of tail centre where the greatest loss was.
He is still eating and happy, playing with things. He has never once appeared ill, other than the fins, so that is something.
