Photo 1 of 1.05% Silver Ion Hot Tub Ag+ Mineral Cartridge Stick for Spa - 6-Month Supply - Easy Installation into Filters & Simplify Crystal Clear Pool Maintenance (2, Blue)

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Photo 1 of 1.05% Silver Ion Hot Tub Ag+ Mineral Cartridge Stick for Spa - 6-Month Supply - Easy Installation into Filters & Simplify Crystal Clear Pool Maintenance (2, Blue)