The Aquascape Rigid Filter Mats provide efficient mechanical and biological filtration for your pond. The filter mat measures 24" x 39" x 1.5" thick and can be easily cut to your desired size and shape using a serrated knife. This allows for installation in a wide variety of skimmer boxes and filters. They are extremely easy to maintain, only needing to be cleaned periodically. For best results we recommend combining different densities to maximizing mechanical and biological filtration. Prov
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