Waterfalls add another exciting dimension to a koi pond installation. They are also an ideal place to filter the water before it spills back into the pond. Waterfall filter pads, located in your waterfall filter, grab the fine particles of food and waste and trap them. This helps keep the water clean and clear, offering a healthier environment for the fish. An Aquascape biofalls waterfall filter is one of the most common filters and you will find we have all the replacement filter pads for them in a variety of sizes. The waterfall filter replacement pads in our inventory are created from the exact same durable materials as your original filter pads made to withstand continual use in a fish pond. We recommend cleaning the pond waterfall filter pad a few times each season (Spring, late Summer, Fall), and replacing them about every 3-5 years.