Poly Guard GP10C System Replacement Cartridge, Scale & Rust Preventer, Up To 6 Month Supply
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<b>[Product Information]</b><br>
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<li>Poly Guard Cartridge fits 10" standard whole house filter housings</li>
<li>The cartridge will hold 1.5 pounds of crystal and treat up to 30,000 gallons of water</li>
<li>These crystals will not dissolve completely and should be replaced in 30,000 gallon intervals or every 6 months to ensure product efficiency</li>
<li>Easy and Economical soluiton for problem water</li>
<li>Protects your appliances and home from hard water and iron staining</li>
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