Hi guys my beta's in a 10 gallon filtered heated tank by himself and I vacuum clean his tank every 1-2 weeks. I feed him brine shrimp once a day and the water parameters are all good (I tested them myself and tested it at a pet store). He's been unable to float and sinks to the bottom for around 1.5 months now. He's still able to swim and rests at objects near the top of the water, but whenever he swims up, his bottom half starts falling down. Here's some pictures of him. What do I do