[AquaticLife] breeding
I’ve never owned them but according to this reputable profile and care sheet, http://fish.mongabay.com/species/Metynnis_argenteus.html, they are egg scatterers. Do you have a gravel substrate on the bottom? It would seem that most of the eggs would fall down between the crevices and be safe from scavenging by the corys. The profile also says to remove the adult silver dollars after spawning.
Lenny Vasbinder Fish Blog - http://GoldLenny.blogspot.com
Category: Philippines Internet Koi Society
