My RCS tank is probably fine but I would like to improve their living conditons. Right now: KH 4, GH 10, PH 7.6 at night and 7.0 during the day with Co2 but the TDS is 400 ppm. I'm doing 50/50 RO/tap with these readings. I'm going to lower the TDS to 200 ppm with 75/25 RO/tap to achieve this but all values come down with it. I'm going to use baking soda to raise the values where they were except the TDS will be at 200ppm. If I don't raise the KH, the PH might come down too low at 6.6. I want it at 7.0, is that makes sense?
Last edited by HUNTER; 12-29-2013 at 09:23 PM.