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My fish all at war this morning!? Nothings changed. What's happening?

Discussion in 'Tropical Fish Emergencies' started by Tttay89, Aug 25, 2019.

  1. Tttay89

    Tttay89 New Member

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    Hi everyone
    Is it normal for all fish to have aggressive days?
    I have had my 120litre tank set up for 5 months now with no real problems yet. Doing weekly water changes and feeding a variety of foods.
    Water levels
    Ammonia - 0
    Nitrite - 0
    Nitrate - 20ppm
    Ph - 8 (our tap water is 7.8)
    Kh- 178
    GH - 320
    Chlorine -0
    Oxygen -9ppm

    My tank stock is
    10 neon tetras
    6 (now 5) guppies
    2 dwarf gouramis
    3 rummy nose
    2 black widow
    1 rainbow shark
    1 albino bristlenose

    The most peaceful one in there is honestly the shark and bristlenose...they mind their own business for now.

    The others are usually relatively peaceful however just this morning I caught gourami number 1 randomly attack a guppy... Repeatedly dragging it down by its tail untill it was unable to swim. I removed the guppy and put in a bucket of existing water. Currently waiting on its fate. I'm now watching the rest.
    Anither guppy is now attacking the second gourami??
    The gouramis are having a little nip at each other occasionally and the rummy noses are chasing each other at extreme speeds round the tank... What on earth is going on!?.
    The only change I have made was live plant I put in yesterday? The gouramis have been eating at it... Could this be causing this crazy behaviour? I also put a copperleaf and drift wood in a few weeks ago.

    Thanks!
     

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