Aggressive Neon Tetras... What's Next?

Discussion in 'Diseases' started by Norio DS, Jan 4, 2018.

  1. Norio DS

    Norio DS

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    My Neon Tetras have become aggressive recently. What can I try next? Read on for background and stuff I've tried already...

    Symptoms


    * Fish chase each other aggressively.
    * Not limited to one fish.
    * Only started happening in the last week or so.

    My Setup

    * 6 Neon Tetras
    * 10-11 Neocaridina
    * Black substrate
    * 3 pieces of mopani wood
    * 2 coconut caves
    * Internal filter (750lph)
    * Temperature around 25C (fluctuates 0.5 to 1 degree)
    * pH around 7
    * Zero lights (Current ballast is broken, waiting on LED replacements)
    * Zero plants (Waiting on lights)

    What I've Tried So Far

    * Water changes of 40% - 50%.
    * Helps for a few hours up to 1-2 days.
    * Then they're back at it.
    * Cleaned the filter sponges in tank water.
    * Also removed Purigen that was very full of tannins from my Mopani.
    * Removed Ludwigia Rubin and the rockwool that it was in, in case the ferts was messing with water chemistry.

    What I Haven't Tried Yet

    * Gravel vacuum. I don't have one but maybe that'll help.
    * Removing the wood. I'm wondering if it has some pest on it that's bugging the fish? I never boiled it.
    * Removing the coconuts. NanoAquatics.co.za already cleaned and boiled them. They use and sell them all the time.

    * Getting more neon tetras. Don't really want more. I'm hoping to have a variety of schooling fish in groups of 6.
    * Treating the fish in a hospital tank. Wouldn't know what to treat for. There's no spots or anything. Just this aggro behaviour.
    * And lots more I haven't tried coz it hasn't occurred to me.

    I'm hoping that lights + LOTS of plants will help because of all the extra hidey-holes to help the fish feel safer and so that the plants can help me clean the water.

    But if there's something I can do now, I'd love to do it!

    What can I try next? Really wanna solve this before getting any more fish.
     
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  3. Reedfish

    Reedfish Moderator

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    Are the Neon's the only fish in the tank?
    Most of the Tetras are found in very big shoals in the wild.
    When there are only a few, any sort of aggression tends to be exaggerated in a tank as there are fewer fish.

    If space allows, increase the numbers in your tank as this will decrease the likelihood of just one or two fish being picked on.
     
  4. OP
    Norio DS

    Norio DS

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    Yep they're the only fish for now. Over time, there will be 3-5 other species in there with them, along with a LOT of plants.

    Are you saying specifically increase the numbers of Neons or just fish in general?

    Thanks for replying! :)
     
  5. Reedfish

    Reedfish Moderator

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    I would increase the Neons if you can.
    Rather have one or two shoals of many. Than a whole lot of ones or twos.

    Shoaling species such as Tetras and Barbs will be less nippy and aggressive when they are with more of their own kind.
     
  6. OP
    Norio DS

    Norio DS

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    Okie dokes, thanks!

    Ignoring this advice any further (someone else suggested similar on my intro thread I think) would be stupid of me. Ego be damned.

    I'll probably put up the Neons as freebies for anyone who can collect in Centurion and rather focus on bigger shoals of fish I like more than the Neons.

    Thanks! I truly appreciate it.
     
  7. OP
    Norio DS

    Norio DS

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  8. Reedfish

    Reedfish Moderator

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    With the shrimp, it's only very very small fish that will be ok with them. Maybe the Microrasbara. Not sure how easy they are to find in SA. (not sure about the others on your list - perhaps touch and go.)
    And even with the Micros, the young shrimp will still possibly get picked off.
     
  9. OP
    Norio DS

    Norio DS

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    I don't mind losing some shrimp. Just wanting to avoid a complete wipe-out overnight :D

    Right now, my Neons are fine with them and, in the past, my guppies and a single albino cory were okay with them.

    I'm definitely going to avoid a Betta or the (gorgeous) apistos I'm keen on until the shrimp have a TON of foliage to hide in.

    But ja, all that said, if the shrimp get eaten, they get eaten. I'm a little more worried about if the fish will eat each other.

    Like the spotted blue eye gets to 3.8cm while the mosquito rasbora is way smaller. Supposedly both peaceful fish but am I asking for trouble by mixing them?

    Thanks for your replies :D
     
  10. Reedfish

    Reedfish Moderator

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    Sometimes fish keeping can be really unpredictable.
    One person can keep a mix of fish that works brilliantly. And for another person there will be problems.
    You mix should be ok.
    But with the shrimps?
     
  11. OP
    Norio DS

    Norio DS

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    Tell me about it! It's crazy.

    But worth it

    Yeah I only realised shrimps would be a problem AFTER I ordered some :p

    I wanted Apistos but they're *definitely* a no-go with shrimp.

    Maybe in the next tank?
     
  12. OP
    Norio DS

    Norio DS

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    Solved, I think!

    I removed the wood and the coconuts and the aggression disappeared.

    Added back the coconuts after a few days... still fine.

    Added 10 Rosy Loaches... still fine.

    Added different wood I bought from a guy who kept it in his tank without issues... still fine.

    I'm going to soak, bleach, bake and prime my mopane wood and then try it in the next tank.

    YAY for a happy ending :D
     
  13. Christiaan Duvenage

    Christiaan Duvenage

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    The best would be to drive to me and give me you're tetras,they will be happy between my shrimps and other tetras;):lol::D
     
  14. OP
    Norio DS

    Norio DS

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    Will happily swop my tetras for some nice shrimp :D
     

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