FNS Plus Pool Filters are designed with curved grids to maximize filtration area. More filter area means better performance and longer periods between cleanings. The internal design has been refined to minimize flow restrictions and, therefore, requires minimal pumping power to achieve a needed flow rate. Get the most reliable and efficient filtration with Pentair's 180009 FNS® Plus Filters. Improve the quality of your water with superior strength and superior chemical resistance, all while enjoying easy servicing with the Service-Ease grid pack. With its high-performance, diatomaceous earth (D.E.) filter, you can remove even the tiniest of contaminants for water that sparkles like never before! Our patented filter design offers more filter area than traditional filters, providing more effective filtration and fewer cleanings. Plus, this filter uses minimal pumping power to achieve a needed flow rate, so you can enjoy clean water while saving energy and money. Get your Pentair 180009 FNS® Plus D.E. Filter today and start swimming in crystal-clear water! Order now to get the best price for the Pentair 180009 FNS Plus 60 Sq. Ft. DE Filter!