Sand-Sifters Crew Description: The Sand-Sifters Crew contains inverts that burrow in the sandbed. Sand Sifting inverts are beneficial for the reef tank because they will prevent nuisance algae growth with their movement on top of the sand, at the same time preventing toxic nutrient pockets from forming under the sand. This crew is completely reef-safe. This Crew Includes: 25 Nassarius Snails 15 White Leg Hermits 5 Sand Sifting Crabs 5 Jumbo Ceriths 1 Sand Sifting Cucumber