[dcw1sfu]

As Reefwars has stated dose equal parts based on your alk consumption. That's the real measurement you want to get right as it can play the most detrimental role in coral health. Don't get me wrong calcium is very important but it's much harder to damage your corals with slightly higher or lower then desired calcium levels. Once you have figured out your alkalinity demand you can start tinkering a bit with calcium.

Also the addition of either supplement has a lowering and balancing effect on the other. To get my levels right initially I tested daily at roughly the same time for about two weeks. Now if I need to its very simple minor adjustments.

I'm telling you though I think you will be more successful taking the kalk offline. It's great on its own, but hard to use with the addition of two part. I also was really reluctant to take my kalk offline but since I did I have had extremely stable parameters.

Is there a reason you are adiment on continuing to run kalk?