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Blagdon Midipond Box Filter System with Built In UV Clarifier, Venturi to Oxygenate, Ceramic Bio Media, Polymer Wool Pad, Carbon Foam, Hinged Lid for Easy Maintenance, 28,000 for Extra Large Ponds :
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Aquatic Experts - Aquarium Filter Pad, Cut-to-Fit Carbon Infused Filter Pad Media for Crystal Clear Fish Tank and Ponds, Fish Tank Filters ,Activated Charcoal Filter,Pond Filters, 10.5'' x 36'' - Walmart.com
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