So how do you keep up with calcium, alkalinity, and magnesium in your reef? 2 part, calcium reactor, kalkwasser, just water changes, or you don't? Lets hear it! Also if you have a cool system for doing what you do share some pics.
I use 2 part on my system. Used a hodgepodge of dosing pumps from different manufacturers, but now just manual dosing.
I also use 2 part dosing. In my case I use inexpensive BRS dosing pumps controlled by my Apex controller. Alkalinity dosed at the top of the hour, Calcium dosed at the bottom of the hour. I manually dose Magnesium because I only need to dose it every 4-6 weeks.
I have used 2 part but have recently changed back to water changes only. I don't have high load sps tanks, though.
They do but the other model is higher volume and more appropriate for water changes unless it's a VERY big SPS tank.