When dosing Kalk (as a formal dose, not in the ATO reservoir), you typically have Ca increases disproportionate to alkalinity (albeit very slowly) since kalk is not a truly balanced additive. How do successful SPS reefers overcome this? Are water changes enough? Do you mix saltwater with lower calcium (so 34 ppt with most mixes) and then dose up alkalinity/Mg? Do you alter the kalk solution? I'm not using kalk (anymore), but I'm considering jumping back in and dosing it very slowly overnight, mostly to help with the diurnal swing (don't have room for a fuge)--which is a pretty fantastic use of fully saturated kalk, if normal daylight alk and pH ranges are good. But also considering it to eek out a little more runway from my ATO (I have a 20G nano, and am not willing to hook my RO up to the ATO [really bad experience with that], so that's a no-go--trying to focus this on the specific Kalk question asked originally