I bought a betta fish (named him Hermin) from PetsMart about 6 months ago...he had been doing great except for the last month to month & 1/2. When I first bought him he was a really pretty deep blue...but now he seems to be turning red. He is about a one gallon tank right now, I make sure to change the water once a week and put the BettaSafe water treatment in every time also. I feed him 3-4 Betta pellets 2 a day. I don't know if I should be worried about him or if I'm over feeding him or if I need to change him to a better tank (maybe one with a light or filter or something) or if he's just getting old. Any help would be greatly appreciated!! Thank you!!!!