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Supreme M4 - 99991013-US
Visible results typically in days — Expect noticeable improvement within 2 days to 2 weeks depending on buildup
Two-cartridge pair: Ready-to-install PC7 pair ensures immediate replacement on hand
or freeform
Nature 2 A Cartridge Size:1 Cartridge Supreme M4 - 99991013-USNature 2's A Cartridge provide pool owners with a way to reduce their chlorine use without resorting to other harsh chemicals, simply by adding this plug in cartridge to their pools water. Designed to be used with Nature 2 Systems, A Cartridge utilizes all natural minerals to purify water, eliminating much of the chlorine odor and irritation associated with chlorine. With your pool using dramatically less chlorine, you will lower your maintenance
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