Polyquat *is* a clarifier, though that aspect often goes unmentioned. At one time (over 10 years ago) you could buy polyquat from the manufacturer (Buckman Labs) under a different name as a clarifier. They stopped that, when they found that some folks had caught on, and were buying the cheaper, but identical, version and using it to fill algaecide bottles.Originally Posted by jmcst25
Ben
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