I decided that leaving the light on overnight (as I did on Friday night) probably wasn't the best idea (if nothing else, I probably didn't sleep as well with the light on), so I turned it off Saturday night. On Sunday morning when I turned the lights on, the babies had scattered quite a bit. The male Macropodus diligently started gathering them up and bringing them back to the nest, but af some point he stopped spitting them back into the nest. He then went to the nest and started gather those ones up as well.
A few hours later there were still a number of them left, but my this morning I couldn't see anything left of the second batch of baby Macropodus.