[tkeracer619]

Everyone will come up with their own way but this is how I do it using arm standard (fine) media. Tune to Alk not calcium. If you have a stable Alk and sufficient magnesium (3x calcium) then calcium will remain stable. So again test for all 3 but focus mainly on Alk(dKh).

-Test Tank
-Run CaRx for a few hours without gas at 30ml/min.
-Make sure Regulator is set low and slowly turn on the bottle.
-Set bubble count to about 30BPM
-Slowly increase gas pressure until it reaches a chamber ph of 6.5
-Test Tank
*If levels are falling
-Increase both gas flow and effluent flow by the same percent. Raise to 35ml/min and 35BPM.
-Test Tank
*If levels are still falling repeat until tank is close to stable.
-Test Tank
-Make fine adjustments to the regulator via gas pressure or bpm to achieve stability.
-Test Tank
*Once levels are stable adjust levels of tank via 2part.
-Test Tank
*Once tank remains stable adjust the regulator such that you try to reduce pressure and increase bubble count. a 50% decrease in pressure (15-7.5psi) is equal to a 100% increase in bubble count (30BPM-60BPM).

Test often at first and at least every week from then on out. Keep a log book of your test results and what changes you made. You will be surprised at what you learn about your tank, its consumption, and your husbandry.