[nsfw] Anyone Had Neon Dwarf Rainbowfish Die Off Suddenly? Important

Discussion in 'Freshwater Fish Disease' started by bobbyta74, Jun 16, 2019.

  1. bobbyta74

    bobbyta74Valued MemberMember

    About 4 months ago, I got some neon dwarf rainbows for my 240 litre (~63 gallon) aquarium, and they all seemed fine for the first 3 months. Fast forward to May, 2 of them died within two days, and today, around a month later, another one has dropped dead. There seem to be no visible signs of any disease on it. Can anyone help?

    Here’s a picture. Looking back, his spine seems to be bent down and to the left. Is it possible that as a male fighting for dominance, he got injured?
     

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    Last edited by a moderator: Jun 16, 2019
  2. CraiginWales

    CraiginWalesValued MemberMember

    How many did you have? Water parameters? Temperature?
     
  3. Adam Pacio

    Adam PacioNew MemberMember

    Was the tail fin split when it was living? Split fins can be the sign of distress or fighting. What else is in the tank?
     
  4. OP
    OP
    bobbyta74

    bobbyta74Valued MemberMember

    Tail fin was split, lived with other rainbows, harlequin rasboras, bronze cories, mollies, an angelfish and a BN pleco.
     
  5. Adam Pacio

    Adam PacioNew MemberMember

    Sorry for late reply. I've been told while considering Dwarf Neon Praecox myself for my own tank that this particular sub-breed is prone to sudden die-off due to lazy breeding. The Dwarf Praecox are popular so inferior strains have developed and been too interbred making what you encountered a rather common occurrence.
     
  6. OP
    OP
    bobbyta74

    bobbyta74Valued MemberMember

    OK. I’ll up the school to 6, then add more rasboras
     
  7. CraiginWales

    CraiginWalesValued MemberMember

    The superior ones really do pop out at you. If they have a fantastic show of neon blue then they’re generally well bred, even when they’re only an inch long. The inferior ones are quite drab in comparison.
     
  8. OP
    OP
    bobbyta74

    bobbyta74Valued MemberMember

    I'm afraid my local big-box stores don't have anything that's really good - not even plants:rolleyes:
     
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