- May 3, 2007
- 18,067
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
Cleaning frequency is related to the size of the filter (sq-ft). Cartridges are typically much larger than DE filters which are larger than sand so on average, sand filters are cleaned more frequently than DE which is cleaned more frequently than cartridges. I clean my 420 sq-ft cartridges only once per year but there they could go much longer than that as there is no PSI rise even after a year of operation.