Yes, I shake them both after it draws down to about 1/2 way or so in my jugs. When I replenish, there is still always a small bit of residue left in the bottom. I just rinse it out with rodi and pour it into my sump, before filling up again.
You'll like auto dosing. Once you get it dialed, you can keep your Ca and Alk very consistent, which your corals should really like.
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