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Particle size ranging from 5–150 microns for effective coral feeding
ensuring the aesthetics of your aquarium are not compromised
it effectively loosens gravel layers
this filter can be effortlessly switched off for maintenance
Black Knight 4" Dia x 9" Long Filter Brushes - 25 Pack 20-50 Particle size ranging from 5–150What are Black Knight Filter Brushes: 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. They last indefinitely and are the easiest to use, most efficient and most cost effective pond filter medium you can buy. Our brushes are used in filtration systems in