fsukum, my friend, If that's your goal, unless you are running a Calc reactor (I'm not, yet anyways), Use 'Mrs Wages Pickling Lime'. It's a powder. I bought mine at Piggly Wiggly (grocery store). It came in a 1 poound bag for about $3. I bought two, and still on my first bag, about 5 months later. You put a few teaspoons in some RO water, stir. Stirred, not shaken- J/K Then you can pour it slowly in your sump like I do, OR, Drip it in slowly, as in an ATO, etc. Very cheap and solves the goal you want, at a FRACTION of the cost. It's not my idea, learned on reef sites.