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  1. Oscar3

    Ion Exchange Support Bed

    The density on the gravel is greater than the density of the Garnet, Silica sand and Anthracite. Also keep in mind that the back flow is intended to "lift" those three layers and the "cake" formed during the filtration while the gravel will stay at the bottom.
  2. Oscar3

    What is max chlorine for safe consumption and swimming

    I found some information on the same sobject: NATIONAL SPA AND POOL INSTITUTE Suggested Chemical Standards for Swimming Pools Free chlorine, ppm 1.0 - 4.0 Combined chlorine, ppm None pH 7.2 - 7.8 (ideal range of 7.4 - 7.6) Total alkalinity, ppm (for liquid chlorine, cal hypo, lithium...
  3. Oscar3

    Pricing on membranes for RO unit

    Try GE Osmonics.They have membranes for RO systems and good experience on RO systems.
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