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The granules are totally soluble
which provides highly-accurate results concerning the three main components of spa chemistry: pH
This will not only improve sanitizer efficiency
and water hardness
BioGuard Arctic Blue Shock Size:2 lb The granules are totally solubleBioGuard Arctic Blue Shock is the perfect first step in winterizing your pool, killing off bacteria, algae, and other contaminants that can wreak havoc on your pool during the long winter months. Its powerful granular formula can be quickly broadcast into your pool without needing dilution, saving you from handling messy liquids. When used in conjunction with an effective algaecide, your pool will stay clean and healthy throughout its winter slumber,
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