Arowan, I tried feeding them after I turned the tank lights off but my room lights were still on; I have mini Japanese paper lantern lights hung up around my room that are always on so there's always some dim light in my room. (long story, too lazy to turn them off)
fishman, yup. It takes my girls about five minutes collectively to get fed (since they keep trying to jump out of the tank). The wafers aren't even soft enough for the cories to start eating by then; mine wait a good hour or more for the wafers to dissolve before they even go near them to eat.