I just dosed the stuff based on what it said on the bottle. I cna't remember what it said but something like Xml per 20 gallons or something. That got the job done for me. I measured the calcium for the first week, then just dosed the same all the time. Every once in awhile I'd test calcium, it was usually fine. Eventually I gave up dosing the stuff as it was a total pain and bought a calcium reactor (expensive but so worth it IMO).
BTW, what are dangerous levels?
Christy
