I use kalk as a ph supplement. I used to use the saturation dose (2 teaspoons per gallon), but now I cut it down to 1 teaspoon per gallon in my ATO. The all for reef is working awesomely on my tank. I use the bulk powder mix because my tank uses up 60 mls a day and it keeps the alkalinity at 8.9. If I don’t use kalk my ph drops to 7.7.Wow!! Stunning. I dose all for reef and am now starting kalk. What doesage shouls i start with? My tank uses .1 of alk per day