I agree. The PoolLife is EXACTLY the Cal-Hypo (also made by Arch ) I was talking about. Use it freely. As long as your CYA is where it is, and your calcium doesn't approach 500ppm, it's just fine to use up. Use it for daily chlorination, use it to shock. But when you see calcium levels in the mid 400's, (you have to test weekly for it), switch to bleach.
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