DIY - Two Part Calcium and Alkalinity

[Myka]

I used Fauna Marin "balling salts" for a couple years, and just recently switched to Bulk Reef Supply chems which are half the price. So far so good. I use the Drew's Dosers from BRS as well. They have been working really well for 2 years now, and don't back siphon at all like some (crappy) dosers - get buy for the money. Btw, you probably will only need 2 dosers, magnesium doesn't need much dosing ime. I can maintain magnesium at 1350 ppm in my tank just by doing weekly 10% waterchanges with saltwater that I bump the mg up to 1400 ppm.