***First off, I know this is a lot of text, but please have patience with me and help my fish****
My betta lives in a 10 gallon tank with a filter and water heater. The temperature is about 75, but I've bumped it up to around 80 because I'm hoping his inactivity is just him being cold.
A few months ago, I moved his tank because he was getting a lot of direct light and I was getting a really creepy algae boom.
It would stay green on his rocks and wouldn't look too bad, unless you moved the rocks around, and then all of the sudden a huge wave for green would come out from under them and dominate the tank. I tried a black out and it cleared it up, so I moved the tank to a darker area.
I used to have a very small fish living with my betta, they got along very well. Suddenly that fish has vanished and my betta lays there at the bottom of the bowl. He used to swim back and forth and go crazy for food. Now I never see him eat when I put food in there and he just lays at the bottom. Occasionally he will get up and move over an inch and continue laying at the bottom of his tank. He no longer flairs his fins up and does not look very happy.
I got my water checked and they said it was fine.
I don't know what to do or what I did wrong??
Should I move him back to the light and just let the algae go crazy? He seemed to have no problem with it, I just didn't like it and that's why I tried to kill it off.
I really love my betta, and don't want to lose him. My local pet stores have a terrible amount of knowledge on betta's, so I'm hoping you guys can please help me out.