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Black knight pond filter brushes are usually used as a mechanical filter, placed before the biological stages in a pond filtration system. Filter brushes are very good at filtering out solids such as leaves, fish waste and string algae.
Black knight pond filter brushes consist of two wires twisted together at the center with filaments or bristles radiating from the core. Brushes are available in different diameters and lengths. Come with a hanging loop for easy installation and they are very easy to clean.
The brushes are used in filtration systems in fish farms, hatcheries, public aquarium, domestic fish ponds and research institutes. No other filter medium is as widely used or has been as extensively tested and proved.
Made in the UK and widely regarded as the best koi filter brush in the marketplace.