help - Betta on side at bottom of tank
Hi, I've had my male koi betta, Indy, since October. He live in a cycled, filtered, heated 10 gallon tank with a light and 2 live plants. His parameters are 75* F 0ppm ammonia, 0ppm nitrites, 0-5ppm nitrates (looked in between 0 &5 ppm). I have an API freshwater master test kit, and have not added anything new to the tank. I dechlorinate the water with seachem prime, don't use fertilizers, and feed him Omega One betta buffet flakes every morning except for Mondays.
He started laying around on top of his filter on Monday, and at first I though he was just sleeping and I was missing him swimming around (spring semester started this week), but he was barely responsive when I was in or around his tank. He didn't and still doesn't have an appetite, is very pale and not very responsive. I moved him into the hospital tank yesterday (2.5 gal, 75*F). He looks dead, but I can tell that he's still breathing. There is no fuzz, bulging scales, white spots, frayed fins, or anything else on him other than how pale he is. I'm attaching pics below; top pic is him today in a betta cup (I tried offering veg instead of flakes to try to get him to eat - no dice), middle pic is what he usually looks like, bottom is just his tank (not sure if its helpful or not). Help, please!