Daphnia are the prey of tadpoles, salamanders, newts, aquatic insects, and many types of small fish. Fluctuations in Daphnia populations can cause algae overgrowth or even a drastic drop in fish populations.

Do fish eat Daphnia?

Can I keep daphnia in an aquarium with fish? You can, but the fish will eat them. In fact, many aquarium hobbyists culture daphnia to feed their fish.

Do snails eat Daphnia?

The snails eat the daphnia and vegetables (and maybe algae). This forms a cycle and this cycle needs to be stable. Not too many snails nor to little poop. Snails seem to stabilize the water quality which is important.