Helix Max UV sterilizers can eliminate single-celled algae and give crystal clear water in aquariums and ponds. The water is guided in a spiral path around the quartz tube, resulting in a more efficient use of the UV radiation than in standard units. The inlet and outlet fittings can be rotated 360 ? for easy mounting at any angle. All Helix Max with a rubber cable and high-frequency electronic ballast, for garden ponds, salt and freshwater aquariums. The electronic ballasts extend the life and efficiency of the UV lamps.