Description Black Knight Filter Brush 16″ X 4″, 3 pack. Black Knight filter brushes are made from the very highest quality Hydrotek polypropylene twisted into two stainless steel wires to form a cylindrical brush with a loop at one end for hanging. The other end is capped with a plastic knob for safety. Filter Brush 16″ X 4″ 3 pack, will last indefinitely and are the easiest to use, most efficient and most cost-effective pond filter medium you can buy. Provides biological & Mechanical pond water filtration. As the pond water passes thru the bristles, there is plenty of area for beneficial bacteria to colonize. They are designed to capture and remove larger debris and particles from the water as it passes through the filter. The bristles of the brush provide a textured surface that traps leaves, twigs, and other debris, preventing them from entering the deeper layers of the filtration system. By capturing these larger particles, they help prevent clogging in other filter media. This contributes to maintaining water clarity, reducing nutrient levels, and supporting a healthier pond environment. Regular cleaning of the filter brushes is necessary to ensure their continued effectiveness in trapping debris. Be sure to check out our Information Center for our Pond Blog on taking care of your koi fish pond Check out our Facebook page for latest news and information.
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