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DanC
Quick question, does anyone use old resin from a di and place the resin before the pre filters as an added bonus to bring the water quality down before it hits the pre filters and RO? Or do you think the resin will be to degraded by then to work? my ppm before any treatment is 240ppm so using old resin before the pre filters to bring the 240ppm down a tad? Anyone think this would work?