I have a beautiful purple betta that has been fading color, fin rot, and trouble swimming to the top for food. After trying baths, Kanaplex, and Prazipro over a period of time, a very experienced fish friend helped me determine that he is aging. The fading started about 2 months ago and the rest has been over the last few weeks. He lays on his hammock most of the day but does manage to catch a few pellets or blood worms at each meal. One eye seems to be covering over with a cataract. I give him vitamins. I have only had him 4 months but I was obviously sold an old fish. Sorry for the long history. Question is this? How long can he hang on like this? I don’t think he is really suffering yet but I don’t want him to either. I have euthanized neons with clove oil but wasn’t attached to them. Should I let him hang in as long as he wants to fight? I love him and don’t want to euthanize him until it is really time.