With any titration test such as alkalinity or calcium hardness that uses an indicator solution the best rule to follow is keep adding drops until you get a distinct color change that holds and then add one more drop to make sure the color stays the same. When that happens don't count the last drop you added. You will soon learn what the proper endpoint is and won't need that last drop!![]()

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Man I love this forum! A lady at the Commissary said K-Mart had bleach on sale...I'll have to check that out tomorrow!

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