Customer favorite3 sizes to fit your pondFor external useTetraPond ClearChoice Pond BioFilters are the perfect choice for healthy, clear pond water. The ClearChoice BioFilter provides a mechanical pre-filter sponge to remove suspended pond water debris. It features advanced Trickle Flow and Bio Ring technologies that provide massive biological surface areas and help remove ammonia and other pond water contaminants from your pond.Internal spray systems and venturi technologies disperse pond water slowly and evenly over the Bio Ring filter media ensuring sufficient oxygen is provided for optimum bio-filtration activities. The ClearChoice BioFilter is used outside the pond allowing for easy and simple accessibility and maintenance. Inlet sizes: 1/2", 3/4" or 1". Output size: 1-1/4".ModelDimensionsPond SizeMax FlowPF-112-1/2" x 15" DUp to 1,200 gallon500PF-217-1/2" x 15" DUp to 1,800 gallon750PF-322-1/2" x 15" DUp to 2,400 gallon1000

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