Curt,
I've never personally tried this, but many reefers add vinegar to kalkwasser - for a few reasons. One being that it lowers the pH of the solution - by doing this, more calcium (hydroxide) is dissolved into the solution.
Take a look at these articles: >Kalkwasser - In Depth< >Kalkwasser< > Expanding the Limits of Limewater: Adding Organic Carbon Sources<
HTH!!
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~ Teri
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"You do not need a parachute to skydive. You only need a parachute to skydive twice."
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