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RS1987

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  1. We have been using CuZn for a few years in our 300 gallon, Hot Springs tub that we bought new in 1997 (plus 15 g potassium monopersulfate salt weekly and continuous ozonation). This product seems to work great - we have not used halogens in over ten years, my wife and I use the tub every night, and have never been ill, and the water looks perfect. I replace the CuZn 2x year when changing the water (we do not use tub June/July/August). What I want to know is exactly how the CuZn works - ie, exactly what are all the electrochemical, aqueous, biochemical and any other reactions going on that the CuZn takes part in - all balanced reactions and products, in as much detail as possible? My son and I are both chemists, but have little idea what is going on. Apparently the ozone and monopersulfate salt do not damage the CuZn matrix, but chlorine does. I have emailed the company asking this but no answers. Thanks in advance.
  2. How are you measuring H2O2? Where are you buying 35%?? It is very hazardous! How much 35% are you adding?It gets diluted to almost nothing in 400 gallons - I can’t imagine you’re adding enough to keep the concentration high enough to kill pathogens. And even a tiny drop of 35% will damage skin tissue- in eyes cause permanent damage. 3% decomposes at a rate of about 0.5%/year when kept away from light at room temp but at higher temp decomposes faster.
  3. I’m wondering same things- how much MgSO4 and also MgCl2 is equivalent to CaCl2 for hardness? Would test strips that are used to indicate Ca hardness levels also indicate Mg? One thing about MgCl2 transdermal absorptivity - how would one know if too much Mg was absorbed - I sit in tub for 15 - 25 min nightly. And does MgSO4 also absorb transdermally and to what extent? It is difficult to move most compounds across the skin barrier which is why there are so few transdermal patches in general - most compounds need a specific carrier, like a specific alcohol. How do you know MgCl2 easily passes transdermally as an aqueous solution?
  4. But why wouldn’t CaCl2 also corrode? I thought the point of keeping it high was to prevent metal pipes from leaching into the water - we have very soft water and end up adding a lot of CaCl2 to increase Ca levels to proper hardness level, ~400 ppm. I think I’m confused about adding enough MgCl2 or MgSO4 to get 6666 ppm - why are you saying this high? I too would like to use Mg salts in place of CaCl2 to raise hardness level for Mg salts health benefits- how many moles of which Mg salts are equivalent in hardness to CaCl2 - ie, how is “hardness “ determined/calculated? I have a 300 gal tub - would Ca hardness test strips work the same for Mg? Those are what I use to determine proper Ca levels.
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