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  1. #1
    Member Rank = Nisai JoaoM's Avatar
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    Grow out for the fry

    Hi


    As mentioned in my other threads, I decided to set up a (low cost) grow out for the totally unexpected fry I got this year (after only 1 year with koi).
    I used an IBC a friend gave me, an old fluval fx5 (probably 10 or 12 y.o.) and two plastic boxes drilled and filled with expanded clay as a shower.
    The media I used was already cicled in the main tank, so I only have to colonize the sponges of the fx5 and the expanded clay of the shower. I used 50% old water and 50% new.


    To start and properly colonize all the midia I only collected 13 fish, 10 of them being the very dark ones I have in the tank (the vast majority of the fry). I left most of the prettier ones in the tank that will be collected in 2-3 weeks
    They had this color in the tank:
    Attachment 611301
    20210812_122143.jpg

    Here is a brief video with the system in place (comments in portuguese...sorry):



    And a few pics of 13 settlers:
    20210917_100556.jpg
    20210916_115548_resized.jpg
    20210917_100732.jpg
    Attachment 611302
    Attachment 611303
    Attachment 611305
    this one is funny
    20210916_120143_resized.jpg


    One day later, they were eating and.... golden instead of black.



    Question: this change of color is most likely due to stress ? being in a white environment instead of a dark one ? normal evolution of the color? all of the previous ?
    Attachment 611304


    Last edited by JoaoM; 17-09-2021 at 06:06 PM.

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  3. #2
    Member Rank = Nisai JoaoM's Avatar
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    These two (still in the pond) are looking nice
    20210918_100415.jpg
    20210918_100437.jpg

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  5. #3
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Hi JoaoM, done a great job there and looks good.
    Not a great expert but you will find there will be a lot of colour changes as they grow especially in your lovely Portugese temps.

    You have gone right in useing old natured media but keep an eye on the params,looks they are growing well.
    John

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  7. #4
    Member Rank = Nisai JoaoM's Avatar
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    Thanks a lot, John !

    As regards the temps I am aiming to 20-22C in the IBC, which I think i will be able to achieve with a minimum use of the heater.
    Do you think that is a good temp ?

  8. #5
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Quote Originally Posted by JoaoM View Post
    Thanks a lot, John !

    As regards the temps I am aiming to 20-22C in the IBC, which I think i will be able to achieve with a minimum use of the heater.
    Do you think that is a good temp ?
    Spot on mate . New forest koi said
    22 for good aground growth
    higher for big fish to get bigger
    And lower to let little fish catch up

    Sent from my SM-G973F using Tapatalk
    Freddyboy the legend

    "we are water keepers first"

    Johnathan

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  10. #6
    Member Rank = Nisai JoaoM's Avatar
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    Did a generous water chnage today and caught one of the black ones than entered the IBC a couple of days ago.

    20210921_150714.jpg


    Quite a dramatic change with only 2 days in the IBC


    I believe in a week more it will be totally golden. If so, it is possibly because of the all white environment vs the dark one in the pond

  11. #7
    Member Rank = Nisai JoaoM's Avatar
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    Took this picture this morning.

    Out of the 24 already in the IBC, 20 were black in the main tank
    20210922_103702_resized.jpg

  12. #8
    Member Rank = Nisai JoaoM's Avatar
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    Yesterday night I caught one of the my top 5 (at the moment, at least)


    20210923_111540_resized.jpg

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