Loosing Salinity

Discussion in 'General Discussions and Advice' started by mytank, 29 Aug 2011.

  1. mytank

    mytank

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    Hi all,

    I have no idea what is going on but I am losing Salinity points before I can say hows your father.

    I use a bobbing salinity measure thingie :) its a DynaMax temp and salinity measurement tool and it is very accurate. I often take a reading and drive to Wild On Pets with a water sample. They put it through their refractor meter and the bobbie thingie is accurate.

    I did a water change on Saturday and did a salinity check and it was sitting at 1024. Did a check on the salinity today and it was back at 1020 - 1021....

    I do lose alot of water to evaporation around 15l a week and top up manually every day with RO water (keep about 150l always around).

    I don't have much salt creep I have inspected quite a bit and can't understand why I am losing so much salt....

    Any idea's?
     
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  3. Pete

    Pete

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    Hi mytank have you looked around the tank to check that you do not have a leak somewhere. And how are you skimming wet or dry
     
  4. RiaanP

    RiaanP Moderator

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    Is the temperature you do the measurements on the same?

    Is the new salt water you add at 1.024? How long after you prepared the water, do you take your measurement?
     
  5. Neil H

    Neil H Moderator MASA Contributor

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    Remember Salt does not evaporate ....

    I would say one of 2 things

    1. you have some sort of a leak
    2. your salinity measure has given up the ghost
     
  6. FrancoisJou

    FrancoisJou

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    Remember, salilinty is affected by temperature. So when you check make sure its at or around 25 degrees.
     
  7. Hermanus

    Hermanus

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    Look for a leak,you maybe toping up with ro but losing salt water through a leak.
     
  8. rakabos

    rakabos

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    Dont add salt if you dont see a leak, your measuring tool is probably broken
     
  9. Alan

    Alan Admin MASA Contributor

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    I would suggest you check with Wild on Pets again.
     
  10. Neil H

    Neil H Moderator MASA Contributor

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    are you skimming very wet?

    you could be loosing salt there
     
  11. mytank

    mytank Thread Starter

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    Def no leak I am anal about leaks and check every day for any leak. Skimming relatively wet... 1l bottle coming off my skimmer every two to three days of gunge from the skimmer cup
     
  12. mytank

    mytank Thread Starter

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    I haven't checked, next time I top up with water I will do a salinity check thanks!!!

    No I do them at random times. I will try keep the temps the same for the next week.
     
  13. mytank

    mytank Thread Starter

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    Hmmm interesting def no visible water leak.

    I used a refractor-meter to verify the reading .....
     
  14. mytank

    mytank Thread Starter

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    Good point thanks, the tank during the day runs at about 27.5 it's only ever close to 25 when the lights are off at night ...
     
  15. mytank

    mytank Thread Starter

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    No visible leak... I don't have water anywhere and just checked again don't see anything
     
  16. mytank

    mytank Thread Starter

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    It did get verified reading from the refractor meter at wild on pets...
     
  17. mytank

    mytank Thread Starter

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    I will do a reading on the weekend and drive through again
     
  18. mytank

    mytank Thread Starter

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    Define wet..... 1l of gunge every two to three days...??
     
  19. Hermanus

    Hermanus

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    Ok then it is the test that is wrong, let a LFS test your salinity. It can only be if you have a leak and top up with ro, or the test is done wrong. Like the refractor-meter is not 100%.(neet to be calibrated) Try and see if there is not a reefer on masa that is close and can test your water. Or take it to a different LFS for testing. Remember if you do a water change the temp of the nsw must be the same as the tank to compare the salinity. For example if tank is 27 and salinith is 1.025 and the nsw temp is 18 the salinity reading can be differint on the same salinity meter. So mybe you have nsw with a low salinity when you do a water change
     
    Last edited: 30 Aug 2011
  20. mytank

    mytank Thread Starter

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    Hmmm good points ! Maybe I should just invest in a refractor meter
     
  21. Hermanus

    Hermanus

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    That will be the best
     
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