My betta in a 10 gallon planted and is rapidly breathing. Not lethargic, swimming as normal and colors are great. Water is heated @ 80F. Healthy betta I've had for nearly a year by now while living in my fairly well agitated planted aquarium, though just now their breathing rate has increased significantly. Ammonia 0ppm, Nitrate 5ppm, Nitrite 0ppm, Hardness 0ppm, Buffer 0ppm, pH 6.4, Chlorine 0ppm.
Please may someone give some sort of explanation? This is really stressing me out, and I really want to know some sort of answer.