Fish Problem

Discussion in 'Marine Fish Discussions' started by Warr7207, 13 Apr 2008.

  1. Warr7207

    Warr7207

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    The last week has been really stressful.

    I have had quite a few fish die and I can't work out why.

    I have a Hippo that had whitespot really bad, that has gone but now he seems to have weird black blotches on his blue skin.

    The other weird thing is I thought the Hippo would be the fish to die if any.

    The fish i have lost all were feeding and very active, then the following morning dead or missing (I have a very good CUC)

    Water parameters are as follows:

    ph - 8.3
    meq/l - 4
    Salinity - 1.025
    Temp - 25.2
    Nitrite - 0.07
    Nitrate - 7
    NH3 - 0.08
    PO4 - 0.04

    Could the NH3 or Nitrite at these levels be killing off the fish ?



    All corals (even SPS) are doing well, nemmie is also looking great and feeding like a beast.

    Any ideas what parasite, bacteria or something else could be killing off my fish
     
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  3. gaz19

    gaz19

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    what cuc you got? starfish could chow them?
     
  4. Warr7207

    Warr7207 Thread Starter

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    Have brittle and linkia, and had them for ages. They not predators.
     
  5. gaz19

    gaz19

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    nitrite is most likely the problem. is your tank covered at the top?
     
  6. gaz19

    gaz19

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    also what fish went missing, size and how long have you had them
     
  7. Alan

    Alan Admin MASA Contributor

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    Definatly a cause of stress in a system. Do you know where it is comming from?
     
  8. Warr7207

    Warr7207 Thread Starter

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    No and yes, I have a canopy but tank itself is open at top
     
  9. Warr7207

    Warr7207 Thread Starter

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    All sorts big, small, 6 months to 1 week
     
  10. Warr7207

    Warr7207 Thread Starter

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    probablyfrom the tank change over 3 weeks ago and the dead fish
     
  11. Mike

    Mike Retired Moderator

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    The bloches sound like ammonia, rather than nitrite, your tank move could have stirred up some problems, large water changes and patience is the key, ammonia actually burns the fish, so be prepared for more losses unless you can remove the fish, but don't add anything unless your perams improve.
     
  12. LikesFish

    LikesFish

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    Nitrite do not kill marine fish.
     
  13. Mike

    Mike Retired Moderator

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    That should be "Nitrite, in low levels, do not kill some marine fish"
     
    Last edited: 13 Apr 2008
  14. Warr7207

    Warr7207 Thread Starter

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    Thanks guys, will test the water later and see if there have been any changes.

    Done 150L water changes in the last two days.
     
  15. LikesFish

    LikesFish

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    Well I meant to say - Nitrite levels as you will encounter in 99% of all aquariums will not kill your fish. The LC50 values for nitrite has been measured in a study to be not lower than about 300 ppm for many marine fish. No hobby test kit can even come close to testing to those ranges - they just do not exist in our aquariums with LR.

    However Nitrite levels as low as 30ppm can kill inverts easily - like urchins, snails etc.
     
  16. Warr7207

    Warr7207 Thread Starter

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    That is interesting, all my other livestock are happy. Shrimps, snails, urchin and corals, that is why I am so confused.
     
  17. LikesFish

    LikesFish

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    I was just trying to say your nitrite levels are not an issue. Neither your nitrate, and unless something died or it is a cycling tank, the ammonia reading is most prob. wrong.

    Check to see if there are any predators you do not know of - such as crabs, large mantis etc.
     
  18. Alan

    Alan Admin MASA Contributor

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    IMO most inverts wont be as sensative to amonia levels as what fish are, there are even reports of clam farmers raising levels of amonia to feed the clams.
     
  19. Warr7207

    Warr7207 Thread Starter

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    That was something i consider but i couldn't see any injuries or signs of predatory action on the dead fish that were still together (some had been eaten by my CUC)
     
  20. lanzo

    lanzo Sponsor

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    eish dude following along:(
     
  21. Warr7207

    Warr7207 Thread Starter

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    Ok water changes are doing the job.

    Nitrate - 2
    Nitrite - 0.02
    NH3 - 0.06

    Would you guys suggest doing daily water changes or see if the nitrogen compound consumers bring the levels down ?
     
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