Corydoras hastatus

Been a long time since these fellas have come to our shores via an LFS.

Enjoy the pictures!






Here are the eggs.

[kampfer]

great job! ...and nice looking corys...envious:P

[900801]

wah congratz bro can i see the fries if it hatches

[Freshman]

congrats!
u adding anything to prevent fungus?

[ash]

the fries will be very cute... once they start breeding, they breed like rabbits.... as long as the water condition stays the same...

wow..
nice collection..
how did you manged to get them to lay eggs on the walls of the container?
place the whole container inside the tank?

Thanks guys!

@ Freshman,
Nothing added other than a partial water change.
The spread between each egg is sufficient to keep fungus at bay.

@ ash,
They certainly breed like rabbit.
Troube is getting them past 2 weeks!

@ fireopal,
I had to standby the eggs myself!
Neat trick thought by a forum friend CKYeo.
You just wipe the eggs off whatever they have been laid on.
The eggs are quite tough to finger touch and sticky enough to stay on your finger tip for transfer.


First, I tried to grow them out in tau huay tubs with partial water changes.
But the fry wouldn't eat after the yoke sack is used up and start wasting away.
Next the uneaten food would kill them.

Second, tried microworms to no avial.

Third, in deperation I sent them back into the main tank with L046.
About one in twenty made it to 10mm or so.

However, at a certain point between 10mm and the time they take on adult colours they get sudden death.
Sometimes I see them floating on the water surface and they try to swim back down only to float up again.
Next day or so they turn up dead!
Only one passed that stage and survived to 20mm and had the markings of a miniature adult fish.
It too had a sudden death!

Fourth iteration, I now send them to my L046 fry tank.
The mortality rate seems a tad bit better.
I se about 6 fry of decent size swimming about.
I just hoping they don't get that swim bladder problem!
BTW does this have anything to do with them getting their first "breath" from the water surface?
I speculating that that could be the cause of their swim bladder woes.
Let's see what happen to these...

ic.
thanks for sharing your experience with us...
hope u get high hatch rates!

[Freshman]

Ooic..
Thanks for sharing!!

no wonder last time my corydoras eggs (common bronze n trili only. ) always kenna fungus..
I rolled off the eggs from the wall.. n house it in those guppy breeder trap.. Mostly is 2 to 3 eggs lump together..
Always is hours later.ard .50% will tio fungus despite adding extra aeration .. Hahaha

Have u tried BBS for ur hastatus babies? I read that it is extremely gd for growth. (last time I use powdered pellets for my babies)

Also read abt having a thin layer of sand in breeding tank. Something to do with bacteria on the bare tank floor affecting babies..

Sudden death - could it be due to the water temperature? U house them in cooler water? e.g. 26deg C n below?

Haven't heard of swim bladder problem for corydoras..
could it be related to the dissolved oxygen?

Lastly.. have u tried the PCF forum? Many corydoras gurus over there.
Good luck!

Sorry..can't help with ur problem..
Paiseh for the messy post also..

Originally Posted by celticfish

Thanks guys!

@ Freshman,
Nothing added other than a partial water change.
The spread between each egg is sufficient to keep fungus at bay.

@ Freshman,
I think the bigger Corydoras lay their eggs in groups, right?
The pygmy orydoras species lay their eggs singly.
The fungus rate sounds about right for the larger ones too.
Very messing...
I thinks that's why some advocate 2M to 1F.
I haven't tried PCF yet but have read their posts extensively.
Hopefully don't need with this new iteration.



All the second half of the eggs have hatched.
Here's a group shot.



Close-up.



Closer...



Here is a fry as its adopting the adult colours.
You can still see some brown mottle from the verticle stripes it had initially.



An older fry with less brown mottleing pattern left.