2 Pack: Mineral Spa Frog Replacement
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<b>[Product Information]</b><br>
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<li>Mineral cartridge contains silver and limestone.</li>
<li>Silver is the sanitizer and limestone neutralizes the pH.</li>
<li>Do not use non-chlorine shock.</li>
<li>Cartridge life will depend on spa size and number of users.</li>
<li>Minerals inside must stay wet. If they dry, unit needs to be replaced.</li>
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