My tank averages 70-120 ppm of CO2 right (KH = 4, pH driven down to 6.3-6.1 range) now running the hagen system with the mist. Considering I barely pulled 15 ppm with the ladder and had rampant BBA problems, I must mention the improvement. The nice thing with the mist system is that I can turn CO2 off at night by switching the powerhead off eliminating the stress of chronic high CO2 levels.