For aquariums up to 10 gallons: 4 Hermit Crabs, 4 Astraea Snails, 3 Cerith Snails, 5 Nassarius Snails. For a 20 gallon or larger aquariums, just order multiple quantities of this package accordingly. Clean Up Crews for Saltwater Tanks are a natural, efficient way to combat aquarium algae and debris in a reef tank. These small animals keep busy in your tank removing non-living organic matter, sifting through and aerating the sand, and keeping harmful nuisance algae under control. ( Our inverts are for saltwater aquariums only. ) *Please note: Discount Coral reserves the right to make suitable and equivalent substitutions depending upon our current stock. Due to variations within species, your item may not look identical to items in the image.
