Lyscer,
What pressure are you running your regulator at? You may be having an issue if you are running too low. Also, what is the presure of your bottle. Finally, what brand of Ca reactor are you using? You also want your effluent rate to drip at a fast drip but not a stream.
Bump up your alkalinity with an additive of your choice until it's exactly where you want it to be. Then test calcium and again, use your additive of choice to get it in balance with the alkalinity. Once you are there, we can assist you in setting up your reactor so you won't have to play with it except when you change CO2 bottles.