PM1000 FILTER PONDMASTER: PM1000 FILTER $39.75 SKU: SUP02211 QTY: Click here to save 5% off of your order! Biological Filters and Filter Kits: Pondmaster 1000 Submersible box filter with filter pads for use with pumps up to 700 gph. 12 x 12 (pump not included) See PM 1250, 1350, 1500 and 1700 for complete pump kits including pump.