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Disappearing Tetras, And Now A Dead Danio

Discussion in 'Tropical Fish Emergencies' started by JenLo, Sep 11, 2013.

  1. JenLo

    JenLo Member

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    Hi all,
     
    About 3 months ago I bought a second hand 100L (22gallon) tank from a lady that lives nearby. It has been up and running for more than a year, and I inherited her fish:
     
    2 mollies
    2 zebra danio
    1 pleco (I think dwarf)
    1 neon tetra
     
    I added to it 2 danios that I already had in another tank, then gradually added 5 more tetras.
     
    Firstly, one of the mollies died not long after the move (I assumed from stress).
     
    Then, two neon tetras vanished the day after I added them, again I thought from stress.
     
    After a few weeks I added 3 more tetras and again, 1 vanished overnight.
     
    Then 2 weeks ago the other molly died.
     
    Now, I have just returned home after an (unexpected) 2 days away to find that 2 more tetras and 1 danio have disappeared.
     
    After looking for them I found the body of 1 tetra and the poor danio, who had become entangled in the filter and looked a bit of a mess :(.
     
    The danio was looking a little on the chubby side before it died, but the others all seem to look quite happy.
     
    I'm feeding them either a scattering of flakes once a day, or some dried or frozen bloodworm as a treat (plus pellets for the plec). I also have live plants and two filters - a stingray and a EHEIM aquaball.
     
    I wondered if something could be eating the tetras - but the danio death is a mystery.
     
    What could be going wrong? I wanted to have 6 danio and 6 tetras so they were in schools, but now I am down to 3 danios and 3 tetras. 
     
     
    I have checked my water parameters with a liquid kit and they are:
     
    ammonia: 0ppm
    nitrite: 0ppm
    nitrate: between 0-5ppm
    PH: 7.8
    temp: 25 degrees
     
    Thanks for any help on this.
     
     
  2. ncguppy830

    ncguppy830 Male

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    anything fish activivty out of the norm?
    on a side note theres no such thing as a "dwarf pleco" there are smaller species though.
     
  3. JenLo

    JenLo Member

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    Nothing out of the norm. They all look fine, and they are eating fine.
     
    Ah thanks, don't know much about him, other than he is fascinating! I might put a pic up and see if anyone can tell me what he is, thanks. 
     
  4. ncguppy830

    ncguppy830 Male

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    hmm thats strange, i stumped, id doubt theres anything eating the tetras
     
  5. SmexxyNick

    SmexxyNick Member

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    Yeah ive had the tetra thing happen to me, when they die there bodys fall apart fast and just get sucked up prob,and i seen a danio of mine get really crazy bloated and then die... But haven't seen that in almost a year.
     
  6. JenLo

    JenLo Member

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    The tanks have had a partial water change and gravel clean tonight. I just hope I don't lose anything else. 
     
    Can danios explode?! It looks like that may have been what happened. 
     
    Not pleasant :(
     

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