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Thread: Should I change my filter sand?

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  1. #1
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    Default Re: Should I change my filter sand?

    Because the filter sand was still damp, it was a bit hard to compare. But what I noticed was that the largest visible particles in the Quikrete were larger than the largest particles in the than the Palmetto sand. Filter sand is *supposed* to be evenly graded, with 90+% of the particles ranging from 0.018" to 0.020". Honestly, neither sand appeared to meet that specification to me, but the Palmetto sand seemed a bit finer, and I know from experience that fine sand produces clearer water than coarse sand.

    "Sand to be No. 20 standard silica (uniformity coefficient not greater than 1.75) .018-.020 in diameter particle size"
    http://www.pentairpool.com/pdfs/TritonIIOM.pdf

    "Grain size 20/40 mesh is most widely used. 90% of the sand is to fall within the specified particle range. Not more than 1% of the total sample
    can fall on the first or last sieve in the series. Clay and silt size particles >105 microns are removed with the processing, as well as weak and crusted grains."

    http://www.eqb.state.mn.us/documents...d%20report.pdf

  2. #2
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    Default Re: Should I change my filter sand?

    No no, the samples were both un used, the Quickrete stuff was from inside the bag, leftover stuff I didn't use. Both bags had some condensation in them though, but this wasn;t sand that came from my filter.

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