WATERFALL/BIOLOGI FILTER - SMALL PONDMASTER: WATERFALL/BIOLOGICAL FILTER - SMALL $117.99 SKU: SUPP02480 QTY: Click here to save 5% off of your order! Pondmaster Proline Biological Filter Spillway (small) Use the Pondmaster Proline Bioligical Filter to easily create a waterfall for your backyard pond. Easily connects with 1.5 tubing via the enclosed bulkhead fitting or barb. Engineered with panels to direct the water flow upward through the bioligical media which is contained in a mesh bag. Small spillway is 15.75. Best for water flows up to 3000 gph. Limited one year warranty. small spillway 15.75 L x 17.25W x 13 H