I have had a JBJ 24gl deluxe with 20 lbs of live rock and 10lbs of live sand. It has been up and running for about 7 weeks NH3/NH4+ = 0 NO2 = 0 NO3 = 0 temp = 78 Ph = 8.2. I have a Royal Gramma, True Percula Clownfish and about a dozen Hermits and snails for clean up crew. I am looking to add a...