Spent over an hour going over the tank centimeter by centimeter - - found nothing but eggs covered in fungus...except for one teeny dead tadpole (looks like a itty bitty guppy fry almost with nothing but eyes, stomach, and tail).

I am going to assume that this was the one that had started turning into a "c" that detached from the wall and disappeared.

so, phantom obviously had TRIED to fertilize them, but he either started too early or too late and only manage to fertilize this one.