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Thread: quiz time on water quality

  1. #1
    Daihonmei dick benbow's Avatar
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    quiz time on water quality

    here's the situation. You get a call from a koi kichi who has just run a series of tests on their pond water.They haven't really kept up with testing for awhile but now They are concerned with a nitrate reading of 40 ppm. They wait a week and run again. Same figures.

    the nitrite read is too small to be measurable.

    PH is 7.8

    gh 100

    kh 80

    the fish look good and don't show any problems. should they be concerned with a reading this high? in ther filtration process what causes this?

  2. #2
    Tategoi jacovors's Avatar
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    I would take a stab and say that they do not do enough water changes or that their source water contains Nitrate to begin with.

    Also heard that an oversized filter can cause this.
    Jaco Vorster
    South Africa

  3. #3
    Oyagoi Bob Winkler's Avatar
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    How about getting a different nitrate test kit and check it....
    Best regards,

    Bob Winkler

    My opinions are my best interpretation of my experiences. They are not set in stone as I intend to always be a student of life. And Koi.


  4. #4
    Sansai Akinosan's Avatar
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    I think I'd just leave things alone and keep a keen eye on things for a while. As long as the fish are happy and healthy, I would'nt worry. Would I be Wrong?
    Koi-Unit
    " Da Best" Chapter
    xxx

  5. #5
    Jumbo dcny's Avatar
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    Assuming that ammonia is also zero or too small to be measurable, I agree w/ Akinosan.

    -Dan

  6. #6
    Daihonmei dick benbow's Avatar
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    There is no Amonnia in any levels that can be recorded.

  7. #7
    Honmei keokoi's Avatar
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    Well not previously knowing what Nitrate readings were going on before hand we would be able to tell. But since none are available.

    Any added supplements to give a false reading of Nitrates.

    Also when in doubt a good water change can help to be on the safe side of things.

    Jaco, when I was in the Reef tank hobby over bio filters gave hihg reading of nitrate as well..

    Joe
    It's a living creature (chit happens)

  8. #8
    Daihonmei dick benbow's Avatar
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    so far I like the mentality to check the source water and the reliability of the test kit. Shows some good common sense here.

    in the conversion of amonnia released from the breathing and waste of the koi,
    it becomes nitrite first and then is converted to nitrate.

    this scenerio was an actual case. The person who was concerned assumed that 40 ppm was too much. It is still well within the safe zone.

    Jaco hit it on the money with water change as a solution. This can become a problem over time in a closed system as it will build up constantly. In this case the pond owner was doing water changes, he just needed to increase them in frequency or %. About 10-15% would be about right!

    so as a practical excercise to this, what are your nitrate levels?

  9. #9
    Daihonmei dick benbow's Avatar
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    sorry Joe, I posted probably while you were. You and jaco hit it!

  10. #10
    Daihonmei MikeM's Avatar
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    In my old pond, nitrate was usually around 12-15ppm, but did get up to 20ppm at times. After hurricanes removed tree cover, algae growth became rapid. Nitrate stabilized under 10ppm. In new pond, nitrate is under 5ppm.

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