{"product_id":"unicelreplacementfiltercartridge45sfrecwarehousec5345unfc5345","title":"Unicel Replacement Filter Cartridge 45 sf | C-5345","description":"\u003cdiv class=\"product-description\"\u003e\n  \u003ch2\u003eUnicel C-5345 Replacement Spa Filter Cartridge – 50 Sq Ft (Marquis \/ “String Handle” Style)\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The Unicel C-5345 is a high-quality \u003cstrong\u003e50 sq ft\u003c\/strong\u003e pleated spa filter cartridge commonly used in select\n    \u003cstrong\u003eMarquis Spas\u003c\/strong\u003e and other hot tub filtration systems that use a \u003cstrong\u003eclosed top with a string handle\u003c\/strong\u003e.\n    Replacing a worn cartridge helps restore circulation, improves water clarity, and reduces strain on the spa pump and heater.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e50 sq ft\u003c\/strong\u003e filtration area for strong debris capture and steady spa flow\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClosed top with string handle\u003c\/strong\u003e for easy removal during cleaning\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOpen bottom\u003c\/strong\u003e design for compatible standpipe\/canister connections\u003c\/li\u003e\n    \u003cli\u003eDurable pleated media and rigid inner core built for repeated cleanings\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eSpecifications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e C-5345\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFilter Type:\u003c\/strong\u003e Pleated spa cartridge\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFiltration Area:\u003c\/strong\u003e 50 sq ft\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTop End Cap:\u003c\/strong\u003e Closed (string handle)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBottom End Cap:\u003c\/strong\u003e Open\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCommon Size Class:\u003c\/strong\u003e 50 sq ft “string-handle” style cartridge (confirm measurements before ordering)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eUsed in \u003cstrong\u003eselect Marquis\u003c\/strong\u003e and similar spa filter canisters that take a \u003cstrong\u003e50 sq ft\u003c\/strong\u003e cartridge with a \u003cstrong\u003estring handle top\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBest practice:\u003c\/strong\u003e match by part number and verify your existing cartridge’s \u003cstrong\u003eoutside diameter\u003c\/strong\u003e, \u003cstrong\u003elength\u003c\/strong\u003e, and \u003cstrong\u003ebottom opening (ID)\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003eIf your current filter is close in appearance but a different height or bottom opening, choose the cartridge that matches your exact measurements.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003ePleats are torn, frayed, or separating from the end caps\u003c\/li\u003e\n    \u003cli\u003eCartridge remains restrictive even after a thorough rinse and deep clean\u003c\/li\u003e\n    \u003cli\u003eWater stays cloudy despite balanced chemistry and proper sanitizer levels\u003c\/li\u003e\n    \u003cli\u003eEnd caps are cracked\/warped or the inner core is collapsing\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eRelated Products\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=Unicel%20C-5345\"\u003eUnicel C-5345 (Shop \/ Options)\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=spa%20cartridge%20filter%20cleaner\"\u003eSpa Cartridge Filter Cleaner\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=cartridge%20cleaning%20wand\"\u003eCartridge Cleaning Wands\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=spa%20water%20test%20strips\"\u003eSpa Water Test Strips\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=spa%20scale%20remover\"\u003eSpa Scale Remover\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"https:\/\/aquapoolsupply.com\/search?q=silicone%20pool%20lube\"\u003eSilicone O-Ring Lubricant (Pool\/Spa)\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eMaintenance Tips\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eRinse the cartridge regularly (often weekly with heavy spa use) to prevent restriction and cloudy water.\u003c\/li\u003e\n    \u003cli\u003eDeep clean every 3–6 weeks using a cartridge cleaner to remove oils; rinse thoroughly before reinstalling.\u003c\/li\u003e\n    \u003cli\u003eIf scale is present, degrease first, then treat for scale (never reverse the order), and rinse completely.\u003c\/li\u003e\n    \u003cli\u003eRotating between two cartridges (one in use, one drying after cleaning) can extend overall filter life and improve performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Unicel","offers":[{"title":"Default Title","offer_id":52589962789180,"sku":"C-5345","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/3280\/9276\/files\/unicel-replacement-filter-cartridge-45-sf-c-5345-cartridges-3409442.jpg?v=1770393385","url":"https:\/\/aquapoolsupply.com\/products\/unicelreplacementfiltercartridge45sfrecwarehousec5345unfc5345","provider":"Aqua Pool Supply","version":"1.0","type":"link"}