I think Hanna has an alkalinity test like the digital phosphate deal. Costs a little more cause you have to pay for the vial of reagent but a digital readout is great when you are trying to figure out how much blue there is or how purple something is.
Its true- and about as close to simple as it gets!
---------- Post added at 01:30 AM ---------- Previous post was at 01:28 AM ----------
Jaime-
It is unclear, after reading, what you are trying to do.
What alk and mag levels are you trying to maintain?
Dont worry about your calc levels right now, as long as they are in an acceptable level.