Recent content by notaNative

  1. N

    Borates for hot tubs

    The PoolMath calculator is handy and validates my point. For a target dose of 50 ppm "borate", PoolMath suggests adding 4582 oz of boric acid to one million lbs of water (120k gal), which comes out to 286 ppm boric acid. Boric acid (H3BO3) is 17.5% boron by weight, and 50 / 0.175 = 286. What is...
  2. N

    Borates for hot tubs

    I believe it's 50 ppm as boron, so that would be 286 ppm boric acid. More info in this AQUA magazine article.
  3. N

    SWG, bromine, and shock

    I'm thinking of trying to run bromine sanitizer using my SmarterSpa SWG with 1500ppm NaCl + 50ppm NaBr. I expect that the SWG in this setup will primarily produce chlorine, which will quickly react with bromide ions to produce HOBr, the intended active species. I didn't see any posts describing...