its 50 gallons with 13 fish, with an aquaclear 110. I find myself constantly putting an airstone in the aquarium because I can tell the fish are suffocating. I usually leave the airstone in there overnight and by morning they are fine. 2 days later they are stressed as heck, won't eat and gasping and yawning like they have no air. anyone know what up? thanks.
ammonia nitrite:0 Nitrate 20
temp: 80
PH: 7.6