Nassarius SnailHow to Care for Nassarius Snail written by Dave Burr Nassarius snails are very useful in aquariums because they eat detritus, or waste, and keep the sand bed stirred. Nassarius snails do not eat much in the way of algae, but are an important part of any reef aquarium. They will also eat any excess food that the fish do not eat. Nassarius Snails stir the sand bed as they borrow through it foraging for food. Feeding: Nassarius Snails are scavengers and