Platy Fry - How Old/big To Be Released Into Tank?

[Ryan_W]

Hi all,

I've got about 15 Platy fry that are around 3 weeks old in a breeding tank.

My question is, how old/big do they have to be before you can release them into the tank? All I have in my tank are Platies and Albino Cories, nothing aggressive.

Thanks in advance,

Ryan