One Stop Aquatics Live Freshwater Bladder Snails - Great feeders! from Shrimp Boutique Excellent feeders for loaches, pufferfish, oscars etc. Reproduces easily in freshwater aquariums. Great live food starter colony. They do a very good job at eating algae and cleaning up after messy fish and plant litter Extremely high survivability. 3/16" - 1/4" ** Caution ** Reproduces very fast.