Cory and minnow grow out project

Discussion in 'Breeding' started by A new day, Nov 10, 2019.

  1. OP
    A new day

    A new day

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    The AquaClear filter is muuuch better. Moved across some more minnow fry from the pond.

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  3. OP
    A new day

    A new day

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    The size difference between the cory fry (same batch, same treatment) is quite radical. A bigger one center at the susswassertang and a small one in front.

    I hope these big ones will pull through and become robust little fish, some of which I’d like to add to the 180L eventually.

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  4. DoubleDutch

    DoubleDutch Corydorasfan(atic)

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    They should look like the upper one..
    Seems like the lower one isn't really eating


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  5. OP
    A new day

    A new day

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    In another week or so I’ll transfer some of the largest minnow juvies to the 65L (where the largest predators are neon tetra). Think they’ll do just fine with those tank mates in another week, we’ll see. The largest of the juvies have now taken on adult colouration and don’t look like mini neons anymore.

    They’re growing very fast with the multiple feeds a day but will need to be much bigger and faster still before introducing them to the 180L, else the largest platys will gobble them up quick sticks and/or they’ll be outcompeted for food.

    With the brine shrimp hatching attempt failing, and not getting my hands on instant brine or other live fry food yet, this tank has been getting Hikari Firstbites initially, and for the last couple of days ground up Hikari Vibrabites and ground up Hikari Shrimp pellets which the minnows, stronger cory fry and shrimp are going mad over.

    Siphoning and 50% wc every 2nd day.

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  6. OP
    A new day

    A new day

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    These cory babies are now almost 3 weeks old and change & grow by the day. Fascinating to watch them develop seemingly in front of my eyes. They look more and more like little fish and less like tadpoles :)

    As expected, only the strong ones made it but they seem robust. Fingers crossed.

    It may sound callous that I don’t know exactly how many made it this far, but there are many hiding spots in the tank and I don’t see them all at the same time. At least 6.

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  7. David Kusner

    David Kusner

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    @A new day it never gets old I know exactly what you mean. I have watched now 3 times and it always fascinates me.

    What I did learn however this time round is that mother nature does it better than me and in the main tank where i left many eggs, I have so far seen at least 5 and they are almost 4 times the size of the ones i took out and transfered to a seperate 20L tank.

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  8. OP
    A new day

    A new day

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    @David Kusner glad I’m not the only one glued to the tank sometimes :lol:
    Yes I don’t plan on purposefully raising them again separately any time soon (it’s hard work) but hopefully some eggs and wrigglers survive and grow out in the cory tank. Sounds as if it rarely happens though, you were lucky! And / or did something right in the setup. Your rock piles probably did the trick :thumbup:
     
    Last edited: Nov 19, 2019
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  9. David Kusner

    David Kusner

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    Yes plenty of rock piles with many crevices and cracks to scatter the eggs into after they ley them.

    I agree its lots if hard work and nerve racking.

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  10. DoubleDutch

    DoubleDutch Corydorasfan(atic)

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    You guys caught Coryditis hahaha.
    No cure available.

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  11. OP
    A new day

    A new day

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    Seems like it yeah :thumbup:
     
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  12. OP
    A new day

    A new day

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    Back in the cory tank they’ve laid a couple of eggs on top of the filter so I lifted the filter up a bit so the eggs are less than 1cm below the water line- where the adults and big ramshorns can’t get to them. Most are fertilised.
    If they do hatch I hope they don’t get sucked into the filter first thing. Problem is that the adult corys follow my hands around like puppies, and if I try move & scatter the eggs it will just alert them to a potential food source :)

    Will add a pinch of Firstbites to the tank daily but that’s about what I can do at this stage. @David Kusner what did you feed the tank before you knew you had cory babies in there?

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  13. MariaS

    MariaS Moderator

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    Yew @A new day

    You have quite a nursery going on there!!

    Love the Cory babies!!!!
     
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  14. OP
    A new day

    A new day

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    3 weeks in and the cory fry are developing some real cory personality :) They recognise me and come up to the glass begging for attention (or food?). Not afraid of my hands. They’re becoming more social, previously they were rather oblivious to each other also. There are at least 10 of them.
    Now also relishing frozen bloodworms and brine shrimp, shaved thinly fron the frozen cube with a sharp knife. I’ve seen some suck up whole bloodworms in a second so probably not really necessary to shave it off.
    Doing bigger and more frequent water changes to keep the tank clean, which is quite a job as I also have to remove & rinse the driftwood, hornwort and susswassertang and siphon of debris. Gradually introducing some tap water (aot only borehole water) during wc to acclimatize them to conditions in the other tanks.
     
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  15. T. Guppy

    T. Guppy

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    Sounds awesome!!
    My Cory's laid more eggs on Monday (this time fertile) so thanks to you I decided to try again at growing them up and I moved the eggs into my empty 30l and I now have 2 day old Cory fry!

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  16. OP
    A new day

    A new day

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    Oh yay! Congrats!
     
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  17. DoubleDutch

    DoubleDutch Corydorasfan(atic)

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    You see : Coryditis entered SA !!!!


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  18. David Kusner

    David Kusner

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    @A new day I actually did not feed the tank since it was an established tank. So their would have been lots of little organisms for them to eat. I started with brine shrimp and now they just het a power that i make my self. Basically same as first bites from Hikari.

    May I ask why you remove the drift wood and plants and clean them off? Wont this destroy all the good bacteria build up? Also cories are scavengers by nature so they love digging around the tank scavenging for anything to eat and will almost eat anything thats tasty to them?

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  19. David Kusner

    David Kusner

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    @T. Guppy Congratulations, its really exciting when that happens and then you remember why you love this hobby so much! Are those albino corie babies?

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  20. OP
    A new day

    A new day

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    Thanks @David Kusner yes perhaps I should stop rinsing the driftwood and plants (in dirty tank water) - would also make my life easier. It was part because it looks disgusting, partly to be able to see into the tank to syphon, and partly because I thought the excess decomposing food may foul the water.

    Thinking I could perhaps start cutting down on the feeding a bit now...?
     
  21. OP
    A new day

    A new day

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    OK you got me thinking and I’ve done a reset on this tank. I was so anxious for them to eat and survive that I’ve overfed tremendously. They are now large and robust enough to find food in the tank plus 1 (maybe 2) much smaller feeds a day.

    Did a last big siphon and 60-70% wc, rescaped the tank using existing plants and some that were removed from the 65L. Hoping this will be more manageable going forward.
     
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