Hi all, I am thinking about buying a new iron filter system and was wondering about the efficiency of the air injection head on the fleck 2510 AI valve. My water only has 1.0 ppm clear iron and .05 ppm manganese. The ph is 7.2 It seems like the contact time of the air with the water would be very short. Has anyone had experience with these valves? Also would they require backwashing every night to keep the air supply in the tank? Thanks , Tim