The Aquamax Classic Eco is fast becoming one of our most popular pumps. It is the entry level pump from Oase who are one of the top aquatic brands. Purchasing this pump is a logical choice as you get the German manufacturer's know how at a highly competitive price.This water pump is designed to run 247 in tough conditions. This claim is backed up by a 5 year manufacturer guarantee warranty validated by self completing a guarantee card post purchase.This pump can be used when submersed in water or dry installed.