{"product_id":"card-on-guard-solar-sanitizer-fin-for-swimming-pools-red-15-000-gal-coverage-12-month-uv-film","title":"Card On Guard Solar Sanitizer FIN for Swimming Pools — Red, 15,000‑Gal Coverage, 12‑Month UV Film","description":"\u003cp\u003e\u003cstrong\u003eCard On Guard Solar Sanitizer FIN is a drop-in solar device that uses BioPhotonX UV conversion film to reduce chlorine demand by 50% for up to 12 months per FIN, covering one 15,000-gallon pool.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for homeowners who want safer, less chemically-intensive pool care, the Card On Guard Solar Sanitizer FIN converts direct sunlight into sanitizing energy at the water’s surface. Unlike systems that generate UV mechanically or rely on powered ionizers, this passive FIN uses an engineered film that works where water meets light, helping maintain cleaner water with lower chlorine use and minimal maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the FIN actually help lower chlorine use?\u003c\/h3\u003e\n\u003cp\u003eThe FIN’s BioPhotonX film converts incoming UV wavelengths into targeted sanitizing energy right at the interface of the film and the water. That local conversion reduces microbes and organic load over time, allowing you to gradually reduce chemical dosing while keeping water balanced.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect UV-to-sanitization conversion at the water surface.\u003c\/li\u003e\n  \u003cli\u003eReduces oxidizer demand so chlorine can be lowered safely by about 50%.\u003c\/li\u003e\n  \u003cli\u003eWorks continuously during daylight without external power or metals.\u003c\/li\u003e\n  \u003cli\u003eDesigned to last up to 12 months under normal residential conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat steps are required to install and maintain a FIN?\u003c\/h3\u003e\n\u003cp\u003eInstallation is simple: balance your pool water, place the FIN on the surface, and let sunlight do the rest. There’s no wiring, no plumbing changes, and minimal ongoing upkeep beyond normal pool chemistry checks.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDrop the FIN into the pool; it floats and orients to sunlight.\u003c\/li\u003e\n  \u003cli\u003eCheck water balance (pH, alkalinity, stabilizer) before reducing chemicals.\u003c\/li\u003e\n  \u003cli\u003eMonitor chlorine\/oxidizer levels for several weeks as you adjust dosing.\u003c\/li\u003e\n  \u003cli\u003eReplace the FIN annually or when performance declines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow much pool volume does one FIN cover and what if my pool is larger?\u003c\/h3\u003e\n\u003cp\u003eOne Card On Guard FIN is formulated to cover up to 15,000 gallons, making it suitable for most residential pools and many hot tubs. For pools exceeding 15,000 gallons, simply add additional FIN units—one FIN per every 15,000 gallons recommended.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCovers up to 15,000 gallons per FIN.\u003c\/li\u003e\n  \u003cli\u003eFor larger pools, use multiple FINs spaced across the surface.\u003c\/li\u003e\n  \u003cli\u003ePlacement across the pool increases sun exposure and overall effectiveness.\u003c\/li\u003e\n  \u003cli\u003eEach FIN provides up to 12 months of expected service life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the FIN safe for families, pets and pool equipment?\u003c\/h3\u003e\n\u003cp\u003eThe FIN is a passive, chemical-free device that contains no metals or additives; it complements — not replaces — standard pool maintenance. Because it reduces the amount of chlorine needed rather than eliminating sanitizers, it helps maintain safe, comfortable water while reducing irritants associated with higher chemical concentrations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNo metals, no added chemicals, and no electrical components.\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard pool finishes and common filtration systems.\u003c\/li\u003e\n  \u003cli\u003eHelps reduce chlorine-related odor and skin\/eye dryness by lowering dosage.\u003c\/li\u003e\n  \u003cli\u003eManufactured in the USA with a focus on sustainable water care.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Card On Guard Solar Sanitizer FIN is made for homeowners and renters with residential pools or hot tubs who want a simpler, greener approach to water care. If you’re looking to reliably lower chlorine use by roughly half, cut down on pool odors and irritation, and add a low-maintenance solar solution to your routine, the FIN is designed to fit into standard pool upkeep with easy drop-in use. It’s also suitable for caretakers who prefer a passive product with annual replacement rather than complex installation or ongoing energy costs.\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: How long does one FIN last?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Each FIN is designed for up to 12 months of typical residential use before replacement is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will the FIN replace my chlorine entirely?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The FIN lowers chlorine demand by about 50% but should be used alongside balanced, reduced chemical maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Card On Guard","offers":[{"title":"Default Title","offer_id":56834389246292,"sku":"B01NANNKGU","price":105.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/card-on-guard-fin-front-view.jpg?v=1787049706","url":"https:\/\/gardenluxe.co.uk\/products\/card-on-guard-solar-sanitizer-fin-for-swimming-pools-red-15-000-gal-coverage-12-month-uv-film","provider":"Gardenluxe Uk","version":"1.0","type":"link"}