{"product_id":"aqualtra-spa-filter-5-x-9-25-in-prb35-in-compatible-2-pack-washable-high-capture","title":"AQUALTRA Spa Filter 5 x 9.25 in PRB35-IN Compatible 2-Pack — Washable, High-Capture","description":"\u003cp\u003e\u003cstrong\u003eAQUALTRA's 5\" x 9 1\/4\" PRB35-IN-compatible spa filter 2-pack provides reusable, NSF-certified cartridge filtration for hot tubs and spas that fit PRB35-IN, C-4335, FC-2385 and similar models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eKeep your spa water clearer and your system running smoothly with these replacement cartridges designed to match popular OEM sizes. Constructed from durable, BPA-free materials and engineered for improved particle capture, each cartridge is washable and built to resist chemicals commonly found in pool and spa water. The pair offers a practical spare so you can swap while one is cleaning, helping maintain regular filtration without downtime.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this filter capture more debris than a standard cartridge?\u003c\/h3\u003e\n\n\u003cp\u003eThese AQUALTRA cartridges use a high-surface-area PET composite fabric and a reinforced core to trap fine particles that ordinary filters may let pass. The design emphasizes layered filtration and a tight pleat structure to hold hair, lint, sand and sediment until rinsed away.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDirt-locking PET composite fabric for improved particle retention\u003c\/li\u003e\n  \u003cli\u003e35 square feet of effective filtration area per cartridge\u003c\/li\u003e\n  \u003cli\u003eReinforced polypropylene core to maintain shape under flow\u003c\/li\u003e\n  \u003cli\u003eHigh chlorine-resistant end caps for longer life in treated water\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this filter fit my hot tub or spa model?\u003c\/h3\u003e\n\n\u003cp\u003eMeasure your existing cartridge to confirm fit: these replacements are 5 inches in outer diameter and 9 1\/4 inches long, with a 2 1\/8 inch opening top and bottom. They are made to be compatible with many common OEM part numbers, but you should always verify dimensions match your unit before ordering.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eOuter diameter: 5 inches; length: 9 1\/4 inches\u003c\/li\u003e\n  \u003cli\u003eTop and bottom opening: 2 1\/8 inches\u003c\/li\u003e\n  \u003cli\u003eCompatible with PRB35-IN, C-4335, FC-2385, Waterway 35 and others\u003c\/li\u003e\n  \u003cli\u003eCheck your current filter’s measurements and part number for confirmation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I clean and maintain these AQUALTRA cartridges?\u003c\/h3\u003e\n\n\u003cp\u003eThese cartridges are designed to be rinsed and reused—regular cleaning restores flow and filtration efficiency. Remove the filter from your spa before cleaning, gently rinse with a hose, and periodically soak in a filter-cleaning solution for a deeper clean; allow it to dry before reinstalling if recommended by your cleaning product.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRinse every two weeks under a steady water stream\u003c\/li\u003e\n  \u003cli\u003eUse a filter-specific cleaner for heavy soil or oily residues\u003c\/li\u003e\n  \u003cli\u003eRemove filter prior to any chemical shock or corrosion-prone cleaning\u003c\/li\u003e\n  \u003cli\u003eRotate filters: keep one in use while the other is cleaned and drying\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat safety and quality standards apply to these replacement cartridges?\u003c\/h3\u003e\n\n\u003cp\u003eAQUALTRA builds these cartridges from BPA-free plastics and NSF\/ANSI-certified materials to ensure they resist common spa chemicals and provide safe operation. The end caps and core are selected for chemical tolerance and structural stability, reducing premature breakdown and minimizing contamination risk from degraded parts.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBPA-free materials with NSF\/ANSI certification for safety\u003c\/li\u003e\n  \u003cli\u003eHigh chlorine-resistant end caps to limit chemical wear\u003c\/li\u003e\n  \u003cli\u003eDurable core to prevent collapse under pump pressure\u003c\/li\u003e\n  \u003cli\u003eManufactured as aftermarket replacements; verify compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? If you own a hot tub or spa that uses PRB35-IN-sized cartridges—or a compatible model like C-4335, FC-2385, Dynamic Series 03FIL1300 or Waterway 35—this AQUALTRA 2-pack is for you. It's suited to homeowners and service technicians who need dependable, reusable filtration without OEM price tags, and for anyone who prefers to keep a spare filter on hand for uninterrupted spa use. Always confirm your current filter’s dimensions and part number before purchase to ensure correct fit and performance.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these filters washable and reusable?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Rinse every two weeks and soak occasionally in a filter cleaner; avoid corrosion by removing before aggressive chemical treatments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this cartridge fit my spa model?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Possibly—measure your current filter: 5\" outer diameter, 9 1\/4\" length and 2 1\/8\" top\/bottom opening to confirm compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AQUALTRA","offers":[{"title":"Default Title","offer_id":54200607801528,"sku":"B0CGLT6L9R","price":87.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0636\/7416\/files\/aqualtra-prb35in-front-view.jpg?v=1790616013","url":"https:\/\/canadianlawn.ca\/products\/aqualtra-spa-filter-5-x-9-25-in-prb35-in-compatible-2-pack-washable-high-capture","provider":"Canadian Lawn","version":"1.0","type":"link"}