Swimline Silver King Solid Above Ground Winter Pool Cover - 33' Round waterford-filter-system-pre-2009 The Filter Fiber Stuff is

The Filter Fiber Stuff is also WQA (Water Quality Association) certified and has met the requirements of NSF/ANSI-50 for swimming pools and spas/hot tubs

total alkalinity and total hardness

Non-toxic formula

briquettes or logs

Swimline Silver King Solid Above Ground Winter Pool Cover - 33' Round waterford-filter-system-pre-2009 The Filter Fiber Stuff isSwimline's Silver King winter pool cover helps keeps your water free from dirt, leaves, and debris. It helps prevents algae growth, so you can skip the costly maintenance and avoid time consuming spring cleanups. 10 x 10 Scrim 4 foot overlap Pool Type Above Ground Pool Size 33' Round Cover Size 37' Round Manufacturer Swimline Warranty 15 Year Manufacturer Pro Rated Warranty 2 Year Full Cover Color Silver