RO container question

Discussion in 'General Discussions and Advice' started by gaboon, 10 Mar 2009.

  1. gaboon

    gaboon

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    I finished filling up my 100L addis container yesterday for a water change, before I added salt tonight I was shocked to see a TDS over 30. Water coming out of the RO unit is 0. The container has only been used for water changes and bought new from PnP.

    Any ideas why? Could leaving it for 1 day with no aeration cause this? (thats an embarrasing question):whistling:

    Could I add anything to get the TDS down? Don't want to dump 100L.
     
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  3. jacquesb

    jacquesb Retired Moderator

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    Gaboon - was the container standing with a lid on? Or open? Could it possibly be that your TDS meter could be de-calibrated?
    If it was standing open - could it be that some dust or ash have gotten into the water?
     
  4. gaboon

    gaboon Thread Starter

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    Thanks for the quick reply, lid was off but its only been 24 hours. Gave it a quick (not thorough) rinse before filling. Meter is calibrated as TDS is 0 coming out of the RO unit. Could a salt residue cause it?
     
  5. dallasg

    dallasg Moderator MASA Contributor

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    Yes it could, salt will add ions and solids to the water. Also the plastic will trap some salt
    Posted via Mobile Device
     
  6. gaboon

    gaboon Thread Starter

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    So should I dump the water just to be safe?
     
  7. Tony

    Tony

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    Maybe it's just sediment from your previous salt mix. Mine is the same. I add RO water of 0 TDS and it rises once in the bucket
     
  8. dallasg

    dallasg Moderator MASA Contributor

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    depends on what u using the water for
     
  9. Tony

    Tony

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    It's my standard bucket that I use for preparing water for water changes. I'm also sure bits of the bucket chemical make up are released into the water
     
  10. trad

    trad Fish, thats the word!

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    The reading wil most definately be due to the fact the salt was in the container for prior water changes.

    check the calabration on your TDS meter if you've ever tested salt water, i think it can distort the reading
     
  11. lIghty

    lIghty

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    I would say this is the main factor.
     
  12. gaboon

    gaboon Thread Starter

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    Cool thanks for all the replies, will use it and give the container a good clean afterwards.
     
  13. dallasg

    dallasg Moderator MASA Contributor

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    what i do is fill it with water from the kettle, about a 1L then swirl it, hot water helps the plastic expand and dissolve the salt, and then i fill with water and vinegar and rinse out.
     
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