sorry just got back from lunch start your co2 at 10 bubs a min and 40 to 50 effected drips a min then test your alk every day for a week then adjust daily to balence the effective drip with the co2 bub to get the ph in your reactor to 6.5 to 6.6 now here is the fun part if your tank needs more demand for alk adding cal and mag you need to balence again the co2 drip and the effected drip over a month you half to know your tanks demand it may take a few weeks of tuning the effective drip down and co2 many mnay times but rember do not do it fast few drips at a time or you will go out of wak also look into cal hydroxide balence it in with it thats were it gets hard it will help take co2 out of the tank and also buffer the system if you have a cal reacctor with no air stones or a place for water get pushed over something or pured in on rocks or something for oxegen then you will fight ph FOREVER hair alge cyno you name it thay all feed on CO2