Kalk is not a good way to raise your levels. It is best suited as a drip to MAINTAIN your levels. Use baking soda to raise your alk and something like Dowflake for your Cal. This calculator will tell you how much of each you need. http://reef.diesyst.com/flashcalc/flashcalc.html
Where are you finding Dowflake? Or Magflake
sorry for the quick hi-jack Ottoman