My pandas almost always lay their eggs on the glass, near plants. I have not seen other fish (or amanos) eat the eggs, but I suppose it could happen. When I see the eggs, I move them to a small tank with a sponge filter and lots of plants and hope for the best. I've gone from having 4 pandas to having about 30.My pandas spawned a few weeks ago and I didn't realize it either till i saw mini pandas everywhere. One thing I've noticed about pandas that is different from other corys is that they seem to like to hide their spawns, I believe mine hid there in java moss, there was not any eggs on the tank walls.
He's probably big enough to eat whatever the other ones are eating. baby brine shrimp or microworms would be nice but not totally necessary.