Wow
So I have had a red male betta fish for about a year now it's was a gift from a close friend. And it came with a .25gallon tank, and in the beginning he was a very happy fish and moved a lot all day and ate very well but now he sits in the bottom of his bowl and doesn't move much and when I feed him (a tiny pinch everyday) he won't eat and to top it all off I think he might has fin rot from what I've read so far and I just don't like seeing him like that he just looks really sad. I clean his tank every 1-2 weeks. So I feel he might be sick because of the fin rot that makes him not feel good but idk much about fish to say so what can I do to help him??? And also to treat his tail? I will attach some photos to show how he looks.