Swill meet these requirements Sand to be No. 20 standard silica (uniformity coefficient not greater than 1.75) .018-.020 in diameter particle size.
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QUIKRETE® Pool Filter Sand (No. 1153), which is designed for use in pool filters and has a typical predominant size range of #20 to #40, or 0.85 to 0.425 mm. The gradation can vary based upon region. Please consult with the pool filter manufacturer to determine any specific gradation requirements for use in the filter.
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