I bought a betta fish back in May. He's all white, beautiful fins & I really really like him. He used to swim around a 1 gallon tank but then I changed him to a 3 gallon for some extra space. His tank has plastic plants, rocks, a light, and heater to keep the temp at a solid 79-80 degrees.
I've noticed lately that he's been floating around the bottom of the tank, seeming to breathe heavily. He doesn't eat, at all... He can't swim horizontally as well as he can vertically. He goes straight to the top of the tank every once in a LONG while and takes a gasp of air & just lets himself fall to the bottom of the tank again. I've tried everything, from changing the water temp to changing the water period. I always treat the water & use a little of his old water to help acclimate him to the new water. Please help me. I don't wanna lose my little guy