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Hi,
I just collected a few pygmy cory fry from my main tank. Can pygmy fry take microworms as their first food or can they only handle infusoria? thanks

My experiense is to leave Coryfry that small in a tank with lots of javamoss and oak/beech leaves.

They will search the moss and leaves for infusoria.

A week or so after free swinning, I start feeding microworms in small amounts.

k thanks, I'll add a bunch of java moss into their little box

I agree with Kim M.
As a matter of fact, I now breed my Corydoras hastatus and C. habrosus the same way I do Aphyosemion Killies in a natural set up. I do have a thin layer of silica sand, but there are hanging and bottom acrylic mops in the spawning tanks. Fry are only removed once they have transformed into the typical Cory shape. Both the adults and young are given microworms each day and a little of the media provides the newest fry with small bugs.I also feed a pinch of Cyclop-Eeze each day.

This is not an intensive high production method but the ultimate number of survivors is approximately equal to a more traditional method.