Clownfish breathing fast, not eating

I have an ocellaris clownfish that I've had for 3 weeks, she had been doing great up until about 5 days ago she stopped eating and is now staying in the bottom corner of the tank and is breathing very fast, while the male clownfish is doing amazing and is full of energy.

Perameters:
7.8 pH
Ammonia 0.25 ppm
Nitrite 0.25 ppm
Nitrate 10 ppm
Temperature 79 degrees Fahrenheit
Salinity 1.020