Neon Dwarf Rainbowfish Is A Bully Help

Discussion in 'Rainbowfish' started by Voldy, Aug 12, 2019.

  1. Voldy

    VoldyNew MemberMember

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    Hi I'm new here. Desperate need of help.
    -i have 20g long tank
    -cycling for 1year
    -lightly planted at left side of tank and medium sized driftwood at the right
    -flourite black substrate, aquaclear 50 filter

    I have a lone male neon dwarf rainbowfish - have him for 10months now (other of its kind died through time until he's the only one left). I'm suppose to buy 6more (2m:4f) but my lfs don't have them in stock.
    so i bought 11 cardinal tetras instead. I rearranged my tank when I introduced them and kept lights off. I've seen my rainbowfish attacking them and already 3 died, 1 each morning.
    I separated him to another tank overnight but still attacking cardinals when put back to main tank.
    Does buying more rainbowfish will help the aggression? Thanks!
     
  2. OP
    OP
    Voldy

    VoldyNew MemberMember

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    added info:
    when the rainbowfish was in a separate tank overnight; there were no casualties was seen the next morning.
     
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