Photo 1 of Replacement for Nature2 Express Mineral Cartridge W28175 for Pool Sanitizers, for In-Ground & above-Ground Pools up to 30,000 Gallons, Replace for W28175, W20171, W20080, W26775

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Photo 1 of Replacement for Nature2 Express Mineral Cartridge W28175 for Pool Sanitizers, for In-Ground & above-Ground Pools up to 30,000 Gallons, Replace for W28175, W20171, W20080, W26775Photo 2 of Replacement for Nature2 Express Mineral Cartridge W28175 for Pool Sanitizers, for In-Ground & above-Ground Pools up to 30,000 Gallons, Replace for W28175, W20171, W20080, W26775