Hi, despite some of the other posts above I'd always encourage dosing. I would highly recommend having a way to test Ca
, and Mg
if you're going to dose. But you could safely put in KH
in a take just for the coralline growth... Even if it was a fowlr
it'd be a good idea to dose alkalinity to increase the buffer... No need for calcium beyond coralline growth. As mentioned, if you do weekly water changes above 25% you may be able to get away with no dosing and hard corals.. Unlikely though.
I'd recommend a 2-part such a B-Ionic or Seachem Fusion. It's good to have a Magnesium supplement also. Economical would be Seachem Reef Advantage Mag powder. I like Aquavitro Mg
because it does not contain ammonia like other Liquid mags. Brightwells, and Sicce are other great Mag options.