Is there a water profile for RO water.

Discussion in 'Beginners Brewing Forum' started by Brewer #328175, Jan 20, 2021.

  1. Brewer #328175

    Brewer #328175 New Member

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    I am going to use RO water from a grocery store and am just wondering if I input anything on the water profile.
     
  2. Nosybear

    Nosybear Well-Known Member

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    Just use all zeroes. It's not exact - RO filters typically leave some ions behind - but it's close enough.
     
  3. Craigerrr

    Craigerrr Well-Known Member

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    Brewfather has the following for RO water, so ya, basically zeros.

    upload_2021-1-20_15-57-49.png
     
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  4. Hawkbox

    Hawkbox Well-Known Member

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    Yeah that's about what I have, it's next to impossible to be absolutely certain so just selecting zeros is a viable alternative.
     
  5. Nosybear

    Nosybear Well-Known Member

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    What you wind up with depends on where you start. I see from my TDS meter that ions are reduced about 90% - I measure tap water at 135 ppm and RO water at 12. It varies: In Winter, I get 6 ppm from my RO filter. I suppose I could have my water tested but when the sum of all of them is 12 (and there are 6 to begin with), I get more variance measuring the salts than from the water itself.
     
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  6. Brewer #328175

    Brewer #328175 New Member

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    Thank you all for the answers. I’ll input all zeros.
     
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  7. Suga

    Suga Member

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    Just be sure of what you're buying, most stores here have at least two different waters. Distilled and Spring. The distilled will be your RO or all zeroes.
    The spring water tend to be a municipal source filtered but not zeros. FYI
     
  8. BOB357

    BOB357 Well-Known Member

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    Looks about the same as Bru'n Water.
     
  9. BOB357

    BOB357 Well-Known Member

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    I've gotten RO out of the same dispensing machine that varied from <10 ppm up to ~30 ppm TDS. so there's really no set standard. Been using the default mineral content for RO found on Bru'n Water, which comes out to ~30 ppm TDS with good results.
     
  10. Nosybear

    Nosybear Well-Known Member

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    An RO filter removes about 90% of all ions so there is always something left. In my water supply, I run between 6 and 13 ppm total dissolved solids so I can essentially treat it as zero. In reality there are some ions there but the amount is less than I can measure with the equipment I have (a scale that measures in 10ths of a gram), so I treat them as absent. There's not enough of anything to make a significant difference in any water profile except maybe Pilsen.
     
  11. Hawkbox

    Hawkbox Well-Known Member

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    Yup. For what we're doing there isn't much we can do to get that level of accuracy.
     
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