I had taken care of three aquariums. This is my most recent one. My nitrate and nitrites are low at 0 to 20 ppm and my my ammonia level is now at 4 ppm. My pH is at 7.5 to 8.0 my general hardness at 60 to 120 ppm carbonate hardness is at 120 to 180 ppm. Specifically nitrites at 0 to 0.5 ppm and...