Sundance® Spas MicroClean® Pleated Filter (6540-501) Pool pH Increaser whenever you are available to

whenever you are available to do so

feeder or skimmer to maintain a constant free available chlorine level of 1-3 ppm

Approximately 3

above-ground pools

Sundance® Spas MicroClean® Pleated Filter (6540-501) Pool pH Increaser whenever you are available toSundance Spas MicroClean Pleated Filter (75 Sq Ft) Part # 6540 501 or 6540 501S The 6540 502 'Throw away disposable' filter is sold separately. The MicroClean system is used in the following Sundance Spas models: All Current 780 Series hot tubs 2002 05 800 Series: Altamar , Cameo , Capri , Caprio , Marin, Maxxus , Optima Sweetwater Series: Bahia , Palmero , Cayman , Caprio in 2006, Metro 2004+, Tango 2002 2003 Original Sundance Parts, No Generics.