PoolRx 101067 Black Units Swimming-Pool-Algaecides (4 Pack), 20,000-30,000 gallon
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<b>[Product Information]</b><br>
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<li>Simply place in pump basket or skimmer basket</li>
<li>Eliminates all types of Algae</li>
<li>Reduces Chemicals</li>
<li>Effective for up to 6 months</li>
<li>Simplifies Pool and Spa Care</li>
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