Why fish die when water parameters are WNL -- a discussion

Discussion in 'Fish & Koi Talk' started by Mmathis, Aug 17, 2015.

  1. Mmathis

    Mmathis TurtleMommy

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    I thought I would start this thread, sort of following on the information being discussed in @bettasngoldfish's thread.

    So, when you have mysterious deaths (and especially a massive die-off like Maria suffered).....your water parameters are WNL and you can't find evidence of a pathogen or predator attack....... Where do you look from there?

    The obvious that we hear and address all the time:
    • pH crash
    • ammonia/nitrite levels
    • low dissolved oxygen
    • over-stocking
    • bacterial or paracitic outbreak
    • which most of the above can be lumped under "water quality issues"
    • predators


    Then any others [feel free to add to the list]:
    • Sometimes fish just die....maybe due to previous stresses or from genetic predispostion
    • Toxins in the water.....due to lawn run-off
    • Toxins in the water.....due to aerasolized products [ie -- mosquito control]
    • Maybe toxins due to something we inadvertently add to the pond........a plant or ornament....
    • __________________
    • __________________
    • __________________

    What about predatory pond insects? They mostly [I would assume] go after the smaller fish such as fry, but COULD they ever be an issue if you have fish dying for no aparent reason? Of course, not the cause of a massive die-off, but what about the occas. death here & there? I know I have those giant water bugs in the pond -- have seen them -- and they are known to attack and kill larger critters..... Just a thought......trying to cover all bases......
     
    Mmathis, Aug 17, 2015
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  2. Mmathis

    bettasngoldfish Maria

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    Good idea Maggie

    adding new fish without quarantine
     
    bettasngoldfish, Aug 17, 2015
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  3. Mmathis

    Mmathis TurtleMommy

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    Also add summer heat! Sun + shallow water = heat = low oxygen levels.
     
    Mmathis, Aug 17, 2015
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  4. Mmathis

    MitchM

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    -consider where you bought your fish from - was the supplier reputable or are they medicated feeder fish that had a short life expectancy to begin with
    -vandalism - rare, but still should be considered
    -addition of quick fix chemicals without understanding their effects and limitations
    -other extreme weather events - hail or lightning
     
    MitchM, Aug 18, 2015
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  5. Mmathis

    Dave 54

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    Lack of fish keeping knowledge. lack of fish health Knowledge.
    Lightening strike direct or indirect , overdoses due to insufficiant knowledge of size and gallonage of pond .
    Under dosing pond due to insufficiant knowledge of size and gallonage of pond
    Water turning toxic because of a rare coming together of high Ph-salted pond water and formalin.
    Overfeeding

    Dave
     
    Dave 54, Aug 18, 2015
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  6. Mmathis

    Mmathis TurtleMommy

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    Giant water bug and gold fish -- poor thing never stood a chance..... I wonder what size the fish is.

    Could a fish be attacked by one of these monsters, but get away only to die from its injuries? I watched another video.....well, only part of it because it was a set-up for the bug to get the fish and I didn't like that....where the water bug was hunting/stalking some goldfish. I suspect that I do have these in the pond.....oh my!
     
    Mmathis, Aug 18, 2015
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  7. Mmathis

    Meyer Jordan Tadpole

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    A giant water bug would leave some evidence of attack on a fish- lacerations puncture marks, missing flesh, etc. Such evidence is easy to see. Maria did not mention observing any physical trauma to any expired fish.
     
    Meyer Jordan, Aug 19, 2015
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  8. Mmathis

    MitchM

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    I have those waterbugs in my pond and I am thankful for that.
    Last summer I started with 20 ruby red minnows and by fall I had over 1000.
    Ths spring I would sometimes pull 20 of these waterbugs out of my skimmer each week. The minnow population would drop and soon after I would not have any more water bugs. Now I have over 1000 minnows again so I expect to see the waterbug population increase again.

    It's all part of natures balancing act.(y)

    .
     
    MitchM, Aug 19, 2015
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  9. Mmathis

    Dave 54

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    Not only that You'd need one hell of alot of waterbugs to attack her fish in a coordinated attack over one night

    Dave
     
    Dave 54, Aug 19, 2015
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  10. Mmathis

    Beckie

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    Poisonous toads (Florida) laying eggs, fish eat eggs and die. I'm wondering if that's my problem since I ruled out everything else I can think of. Never heard of it before but found articles that bring up the possibility. Weird things happen in ponds, right?
     
    Beckie, Oct 14, 2017
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