Aquadyne Model AD30000 Filter Perfectly suited for koi ponds up to 28,000 gallons. Supports up to 480 pounds of fish. 8.8 Cubic feet of bead media. Diameter 36"�, height 48"�, maximum pressure 50 psi. Average water to backwash 90 gallons. Average flow through filter 1200-6000 gph

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