I started adding kalk to my ATO RO water. Dosed 4tsp/5gal. From Thursday - Sunday, Alk went from 7.8dkh - 10.2dkh. I did not think kalk could be used to raise alk. So I decided to test new saltwater from my LFS. The Salifret ALK test kit says it is 16dkh. Anyone else seen this from SeaChem salt? I retested my tank and it is still 10.2dkh.