In the video below, you'll notice a sponge over the filter intake. This dramatically reduces the possibility of an angel getting sucked into the intake. As the smaller brine shrimp gets pulled toward the intake, it also allows the babies to eat the shrimp caught in the sponge without mishap.
I am now feeding them dried brine shrimp instead of freshly hatched, plus First Bites. As they get larger, they will be introduced to a high quality dried food (I prefer Tetra Color).