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Thread: Questions on the ammonia readings of my tanks

  1. #1
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    Questions on the ammonia readings of my tanks

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    I have 3 tanks for my shrimps. My frist 10g has yellow shrimps. Second 10g has minami shrimps and other 20g tank is for CRS and cherry shrimps. They are doing fine and breeding pretty good. I did water test today and all of the tanks seems to have good pH. When I tested my ammonia, 2 of the tank seems to have 0-.25ppm range and one other tank seems to have .25-1ppm. Just wondering .25-1ppm would harm any of my shrimp? I had one yellow shrimp died about 1 week ago but, rest seems to be doing good and eating well. I am hoping there are no more death...

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    hi there=D did you cycle your tank?
    Last edited by Quixotic; 9th Apr 2008 at 20:22. Reason: SMS lingo: 'u'

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    My tanks are just fine. It is cycled and been about 4months. just wondering if .25-1ppm range of ammonia will kill the shirmp...

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    go9ma123,

    Are those readings for ammonia, ammonium or total ammonium??
    silane

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    Ammonia occurs in two forms in water, NH4+ and NH3. They are called Total Ammonia Nitrogen (TAN). Test kits normally tests for TAN.

    NH4+ is ionised Ammonia because it has a positive electrical charge.
    NH3 is called unionised Ammonia since it has no charge.

    NH3 is the form toxic to fish and it is a small fraction of TAN.

    Water temperature and pH will effect which form is predominant. If water temperature and/or pH is high, NH3 will be high.

    Given the specific water temperature and pH, NH3 can be calculated from the TAN.

    Free Ammonia-Nitrogen Calculator & Information
    http://cobweb.ecn.purdue.edu/~piwc/w...monia/nh3.html

    http://www.thekrib.com/Chemistry/ammonia-toxicity.html
    http://edis.ifas.ufl.edu/FA031

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    Thank Quixotic,

    That's what I want to lead the thread to.

    Appearantly, NH4 is not toxic to shrimps at least in short terms, got to know a few person, who starts to put shrimps into a new tank with soil based gravel, it is ought to be low pH and has lot of ammonia, but shrimps were ok. I presume the tank is cycle eventually and has no further harm done to shrimps.

    Not so luckily for shrimps that stay in high pH, the sulawesi shrimps, many has little success when they tried to keep them at 8, but result improve when pH is lowered to 7.5.

    So pH and temperature is very crucial here when coming to ammonia toxicity.
    Last edited by silane; 10th Apr 2008 at 01:59.
    silane

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    Sorry not post NH3 and NH4+.
    Two test I did was NH3/NH4+ and pH.
    Yellow shrimp tank had NH3/NH4+ reading .25-1ppm, pH 6.8 and temperature was 23c.
    Also, Quixtic and silane thanks for for your information.
    I also like the web link

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    I do have about .25ppm as well after dosing sechem nitrogen. That product contains urea and ammonium. So in a way it affects my ammonia test kit readings.

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