HTH 67008 Calcium Hardness Increaser, 4 lb
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<b>[Product Information]</b><br>
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<li>Hth calcium hardness increaser, 4 lbs.</li>
<li>Low calcium hardness may cause the pool water to be corrosive, resulting in damage to pool surfaces and equipment</li>
<li>Raises calcium hardness levels. Prevents corrosion of metal & plaster surfaces. Compatible with Salt Systems</li>
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