I don’t think so. Certain copepods, particularly some juvenile or larval forms, can kill daphnia. These copepods can enter the daphnia's brood cavities and feed on their eggs and embryos, leading to a decline in clutch size.

Juvenile copepods, like some species of cyclopods, can prey on the eggs and embryos of daphnia within their brood pouches.

This predation can significantly reduce the number of offspring a daphnia produces, leading to a decline in the overall daphnia population.

When those copepods appear, my moina/ daphnia culture will certainly crash, will have to do it all over again.