M Beautiful was tending them diligently, Skye was going off to sit in corners and then she would rush over and threaten him and he'd come back and help fan for a while. Or pick stuff off.
Then I did regular tank maintenance, and this time lifted out one sponge filter to rinse it. I did it slow and careful but the angelfish were upset. Skye made threatening rushes at my hands and the filter, but stopped short of actually biting. And later that day they ate all the eggs.
Funny moment- I saw one of the zebra snails crawling on the airline inside the filter uplift.