Aqua Flo, Flo-Master Spa Pumps are designed with a unique, high-performance impeller providing flow rates that exceed all tested competition. Aqua Flo, Flo-Master Spa Pumps are engineered with careful attention to detail and accuracy. In many applications the outstanding flow rates will allow you to use a lower Aqua Flo horse power pump to do the same job. Less H.P. means lower operating costs.