Matala biological filter for koi ponds and water gardensExpandable, high-capacity pond filter accommodates a variety of pondsProvides unparalleled biological filtration for superior pond water qualityExpandable gravity filter maximizes Matala filter media performance. The rugged Biosteps 10 contains an amazing 200 sq. ft. of surface area for beneficial bacteria growth. Combined with a cross flow design that traps and processes more debris at high flow rates, you get unparalleled biological filtration for superior water quality. Combine multiple units for large or heavily stocked koi ponds, or use Biosteps 10 with UV Clarifier for improved water clarity. Universal barbed inlet (1", 1-1/4", 1-1/2"), 1-1/2" outlet. Measures 23-3/16" x 15" x 20-3/16" high. Model Max Pond Size Max Flow Rate Biosteps 10 2,660 gallons 1,060 gph Biosteps 10 with 9W UV Clarifier 800 gallons 400 gph Biosteps 10 with 13W UV Clarifier 1,200 gallons 600 gph Biosteps 10 with 18W UV Clarifier 1,600 gallons 800 gphRecommended flow rate for optimum UV performance. Matala Filter Media Specifications Filter Media Quantity Included Free Volume percent Low density (Black) 3 sheets 92 Medium density (Green) 2 Sheets 93 High density (Blue) 2 Sheets 94 Super high density (Gray) 1 Sheet 94Please click on "More Information" for directions for use and flow rate charts.

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