Quote:
Originally Posted by mrhasan
Since my mag (1380) and ca (440) remains within the desired value in between water changes, I was thinking of not touching them. Or should both Ca and Alk be dosed at the same time?
|
Ca and alk drop proportionately. For every degree of dKh you drop you lose about 20ppm Ca, they are simply combining in that proportion to produce Calcium Carbonate. It is possible your water changes are adding enough Ca but not enough alk to keep up, so you could just dose alk. Most of us have to dose Ca, alk and Mg in some ratio to each other to keep up between water changes.
Dan