makes perfect sense to me. i used to keep barking tree frogs and noticed that if i coated the flies in chlorella powder, the frogs grew faster. at first, they didnt like the powder coating, but they cam around to it eventually. when they got big enough i would eventually move on to crickets that had been gut loaded with a thin algae wafer i made from the chlorella. when you think about it, they naturally eat things that feed on detritus or plants in the wild. its rare to find a predator that will eat only one type of prey that feeds on only one type of food(like fruit flies raised on fermenting potatoes).
i would have gut loaded the flies, but i was never sure if they were actually eating the algae...