Have a betta fish that seemed fine yesterday, took food, was swimming. Today is just sitting on the bottom of the tank, or sitting on an anubius leaf. Not eating. Swims a little but not much. Fiance thinks he might have gill hyperplasia, see photos. Seems to be breathing more rapidly. 2.5 gallon aquarium, Temp 76, Carbon mini-filter. Did a 30% water change today, Nitrate and Nitrite 0, NH3 level 0. What is going on? No white spots.