Water Blaster pumps are based off the same design as our popular Bubble Blaster skimmer pumps but intended for water circulation. These pumps feature a digital control circuit board inside that controls directional start up and RPM speeds. This smart circuit board will shut the pump off if it detects a problem. Something never seen before on internal or external pumps is the Silicone Nitride shafts and bearings that we use. The benefit of this material is that it will not allow calcium to adhere to it like ceramic. This means less maintenance and cleaning and more time for you to enjoy your aquarium instead of working on it! With the performance of these pumps and a 2-year warranty how can you go wrong. Reef Octopus offers several different models for water flow and head pressures. Check out the complete line for a circulation pumps and find one that fits your needs.