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C.Hastatus
September 24, 2013
4:39 pm
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mikev
NYC
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Another one for cory experts --- Have anyone per chance bred/raised them?

My results so far are pretty bad: lots of eggs but most fry does not last more than about 3 days.... I raised so far only about a dozen.... I should have had 100+ if all survived. I'm assuming that this is due to starving to death, tried various foods (powder, paramecium, frozen rotifers, walter worms) but they do not seem to make much of a difference... the only thing that someone helps is to place them into a mature and dirty tank, then they may survive... In a clean new tank, survival is 0%.

Strangely enough with pygmy cories the survival I see is almost 100%... the species are closely related, the fry is quite similar, but hastatus is perhaps 30% smaller, and I suspect this is the difference?

Any hints?

September 24, 2013
8:40 pm
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BigTom
Edinburgh
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Haven't kept them myself but the current US Amazonas (Sept/Oct 2013 issue) has a nice article about the various pygmy corydoras. The author doesn't give much detail about feeding fry specifically, but mentions feeding his tanks with plenty of Artemia nuaplii and other small live foods, and that for hastatus that the fry tend to do better when raised with their parents (mature tank with leaf litter and lots of moss) and appear more delicate if separated.

September 24, 2013
9:06 pm
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KittyKat
Norwich, UK
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mikev, have you tried decapsulated brine shrimp? It's quite small feed, a bit smaller that nauplii if I remember the nauplii size correctly.

Kat
September 24, 2013
9:49 pm
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mikev
NYC
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Thanks, you two...

It is very likely that parents' tank would work... but in fact it seems that any mature (say running for 6 months and suitably dirty) tank works, the problem is that I have a limited supply of such tanks. I cannot put newborn fry with 1cm fry... and I do not like moving 1cm fry either. And just letting some fry grow with the parents will not ever result in a large number of them.
Artemia is definitely too large for c.hastatus (c.pygmeus is fine)... decap -- darn! I should have thought about trying it too... will do, thanks Kat!

PS. Thanks Tom for the Amazonas mention... really nice issue!

September 24, 2013
10:53 pm
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Graham Ramsay
Blairgowrie - UK
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I kept them as a self sustaining colony for several years. Every couple of months I'd trawl a net through it and sell or give away the excess. At times there would be over 100 fish in a 2 foot tank.

I kept them with cherry shrimps for a while but eventually got rid of them as they made too much mess.

Eggs were laid every 2 or 3 days in the plants (Java fern and Java moss) and on the glass. The fry sheltered in the masses of Java moss until they were big enough to join the adults.

Eventually I moved them all on as no one was buying them at auction and I wanted to try something else in that tank. I did the same with pygmaeus for an even longer time (about 5 years).

I didn't feed the fry anything, they ate what the adults got or found food for themsleves in the moss.

September 25, 2013
12:36 am
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mikev
NYC
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Wow.... very interesting.... I have a couple of self-sustaining aspidora tanks.... maybe this is the thing to try indeed rather than collect eggs. They do spawn every 2-3 days indeed....

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