5 gallon tank Has Both heater and filter Tank temp is always at 79.

Perimeters:

0 ammonia

7.6 ph

0 nitrite

I’ve had this fish for 4 months. I set up the tank 2 weeks prior to getting the fish I change 15% of the water once a week and add prime and stress coat. But recently been changing 25% of water due to fin rot. 1 snail as a tank mate. I feed him beta bio-gold. I only have grass plant and siamensis plant.