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Water Flow: 1500-4000 litres/hour
Its adjustable features and quiet operation make it an essential addition to any aquarium enthusiast's toolkit
Effective range: Each 500mL treats 100-200L (25-50 gallons) depending on conditions
quartzless design
Acetate-based calcium converts quickly to calcium bicarbonate upon use
Black Knight 8" Dia x 10" Long Filter Brushes - 12 Pack aquacolour-white Water Flow: 1500-4000 litres/hourWhat 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