Install a new Cartridge Filter to your existing pool equipment. This large capacity system will provide the cleanest water possible while continuing to go forward with our “Go Green” proactive maintenance programs. No backwashing or diatomaceous earth (D.E.) is required with this unit, so it eliminates D.E. mess in your street or yard after backwashing. It is recommended that the cartridges inside the filter tank be cleaned at least once during the summer and again at the end of the season during winterization procedures. This will promote water clarity and a prolong cartridge life.