Replacement Filter Replacement cartridge filters for Bullfrog Spas 10-1086, Filter, Cartridge, 1997 - 1999 65 USD 10-1085, Filter, Cartridge, 2000 - 2002 55 USD 10-2870, Filter, Cartridge, Microban, 2003 - Present except STIL 60 USD 10-00282, Filter, Coreless Cartridge, A, R, X 2013 - Present, All 2003 - 2012 except STIL 55 USD 10-00281, Filter, STIL, Coreless Cartridge, 2015 - Present 55 USD 10-00417, FILTER, CAGE CORE ASSEMBLY W/CAP, 2003 - Present 35 USD 10-00279, FILTER, CORE CAP, 2003 - Present 15 USD 10-00260, FILTER, CAGE CORE ASSEMBLY, 2003 - Present 30 USD 10-1035, Filter, Cartridge, CLICK FOR REPLACEMENT INFORMATION 0 USD 10-2785, Filter, Cartridge, Microban, CLICK FOR REPLACEMENT INFORMATION 0 USD 10-3430, Filter, Cartridge, STIL, CLICK FOR REPLACEMENT INFORMATION 0 USD