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Amazon.com : Palmetto Poolfilter-50 20# Grade – Formulated for All Residential, Commercial Pool Sand Filters, One Size, 50Lb-A : Patio, Lawn & Garden
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Pool Medics - FAQ: How often should my filter sand be replaced? Dirty or damaged sand will increase the pressure in the filter which can cause the filter to crack. Cracked filters
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Amazon.com : HTH 67120 Swimming Pool Care Pool Filter Sand, 50lb Filtration Media for Clean Water : Patio, Lawn & Garden
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Amazon.com : Aitsite 1.5 lbs Pool Filter Balls Eco-Friendly Fiber Filter Media for Swimming Pool Sand Filters (Equals 50 lbs Pool Filter Sand) : Patio, Lawn & Garden
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