Maintenance and Training ◄ Back Next ► Picture 51 of 62 Backwashing the filter involves pulling clean water backward through the filter using a large syringe. This process must be performed daily. Meta data Camera / Type iPhone 13 Aperture F 1.6 Focal Length 5.1 mm Shutter speed 1/60 sec Date / Time 1725378621 Photo Galleries Home Mission Map Summary Report 2024-10-26