ec reverse omosis

  1. DrTentgrow

    ec/ppm is mine to high?

    hello there Ive just measured my tap water with a EC meter and it reads 0.4 i found a site that converts EC to ppm and it says its 280 in a book i have it recommends getting a reverse osmosis machine if the water is over 300 ppm do you think i will be alright with out one for now? have a look...
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