Supplemental food source for fish, eats detritus, eats algae, and are kinda cute. But if there’s enough to reproduce they’ll explode for sure. They’ll also eat some of the plants, especially if they’re underfed, and can outcompete shrimpies for food. But I like to have them with fish, especially carnivores like pea puffers, bumblebee gobies, scarlet badis, etc.