Adjust spray nozzle to stream, spray inside fabric pleats. Hose off using garden hose with spray nozzle. For best results, let cartridge air dry for fibers to expand.
Drain water from tank exposing grids. Rinse off old DE powder. Spray directly onto the grids until saturated. Hose off using garden hose with spray nozzle. Open inlet valve to allow water to rinse over grids. Close inlet valves, drain tank, refill tank, pre-coat as usual.