Hope they will hatch & try to leave a small dim light at night, as it's done with Angels.
Try to find some rounded rocks, as they like to lat their eggs on flat rounded surfaces (at least that's what i read, somewhere).
BTW, do you want a few shoots of Echinodorus tenellus?. They are runner plants & stay quite low. If you want, i will send some over on Sunday.
Please treat Corydoras as community inhabitants & not as scavengers.
