How do you maintain your MAG / CALCIUM levels

[Delphinus]

I dose bulk for big-3 (Ca, Alk and Mg). Been getting from Littlesilvermax to date for Ca and Mg (and just Costco for baking soda for Alk) but now that he's shutting down will probably go BRS from now on and I hear the Alk stuff is much nicer to work with than baked baking soda. Or Oceanic or Red Coral if they maintain steady supplies.

Zeovit is not for maintaining big-3 but is for other things...