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  "description": "Buy a hot tub filter cartridge 2 pack compatible with FD2007, PWW50L, 4CH-949 and FC-0172. Clearer spa water starts here. Order now.",
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      "abstract": "Need a hot tub filter for holiday let UK changeovers? Why a 2-pack spare on the shelf protects reviews when guests overlap and water must look right on arrival."
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      "abstract": "UK cloudy-water checklist: clean or replace the filter before you over-dose chemicals"
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      "abstract": "When a UK 2-pack beats a single cartridge for wash-and-wear rotation"
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      "abstract": "375mm vs 275mm spa cartridges: pick height from your housing, not from a vague 'universal' label"
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