many articles say not to build up your Calc/Alk with your Ca Rx. Drops your PH, messes up your Calc/Alk balance, all kinds of stuff. Pick up some 2 part to build it up to your set points, then use the Ca Rx to maintain it. I did this and found it VERY helpful. Ca Rx dose equal parts Alk/Calc, so if either is off then you'll maintain an imbalance. I use a bubble counter aswell, works great, set it to 1 bubble a sec, my drip to 1 drip per second and it only took a little fine tuning to get it set.
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