For the first year or so I had tanks I manually dosed Kalk and Magnesium. I rarely had pH over 8.2 because of sloppiness and forgetfulness. Calcium levels were all over the place. A year ago I got a couple of dosers and started dosing Alk / Cal using the BRS Recipe #1. My calcium and alkalinity are fairly stable but pH doesn't get above 8.1-8.2 with this dosing and I would like to raise it a bit. I'm considering adding automated Kalk dosing to raise the pH. Rather than using dilute kalk with top-off water I plan to use concentrated kalk + vinegar according to the recipe in this article Randy Holmes-Farley ReefKeeping : What your grandmother didn't tell you about lime I'll start with 20ml/day during the middle of the night and adjust up as long as my pH is below 8.4 Anyone else doing kalk dosing? Kalk+vinegar for better management and added carbon? I am totally scared off of kalk top-off by bad experiences I have seen reported. I'm not likely to switch to Ca reactor any time soon (unless I were to wake up one day and find one sitting under the Christmas tree). TL/DR Today: Calcium, & Alkalinity (Baking Soda) automated dosing, Magnesium & Iodine manual dosed once a week. Plan: Calcium, Alkalinity (Baking Soda) & concentrated Kalk+Vinegar automated dosing, Magnesium & Iodine manual dosed once a week.