I got my male Betta last August from one of my local fish stores, I had noticed him starting to act a lot less active and not quite himself around the start of this year " January " he was laying on the bottom of the tank more and just generally sluggish.
I contacted the fish store in my town centre who have experience in keeping Bettas and always seem to stock them and was told his decline is old age as he will most likely of been at least 3 when I purchased him as this is age many places tend to sell them due to this being the age when they look most in their prime, I was also told not to expect him to live that much longer maybe a month at most.
He is still with me but is getting worse and worse all the time, he just floats at the top of the tank more often than not on his side like he can't seem to stay up right, he has recently lost a lot of his appetite and I will at most get him to eat one pellet, even his favourite frozen blood worms he will eat one and then just isn't bothered.
I test his water parameters regularly and they always come back fine, no ammonia or nitrite I have tried treating him with various things, aquarium salt, Esha, Melafix and nothing has helped, so I now am facing the difficult decision of do I just let him go naturally or do I euthanize him.
His quality of life has all but diminished and its horrible to watch him decline day by day could this indeed be old age or is it illness? I have never seen any signs of fin rot, fungus or stress e.g. ripping his own fins it just seem to be a gradual thing.