Best Filter + Best Performance
Dolphin Sigma
Dolphin Sigma is part of the ProLine Series, designed for the most demanding pool owners. Sigma has four important differences:
First, Sigma includes standard fine filtration like other Dolphin units but Sigma also adds the pinnacle of robot filtration, the NanoFilter. Most robotic pools cleaners contain a very basic mesh screen, but Sigma boasts genuine pleated filters capable of capturing the smallest debris.
Second, Sigma cleans both the waterline and scrubs the area over the waterline.
Third, Sigma is designed on the commercial platform so you get not two but three commercial grade motors and a gyroscope onboard the microprocessor for ultimate suction power.
Fourth, Sigma boasts one of the longest warranties at three years.
