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.