The ammonia level 2ppm doesn't seem to be going down. Nitrites are zero but nitrate level is 80 to 160 ppm. The ammonia level actually increased when I added ph down after checking ph and found it 8.5ppm. Am I just being impatient. Also, has anyone raised bluegills? I checked and they tolerate a wide variation in water temperature. Here in Michigan I will need to heat in winter but not as warm as tilapia.