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Toggle controls - The Fluval E-Series Heater has a simple precision temperature control that uses a toggle to allow you to quickly set the correct temperature for your aquarium
bind ammonia
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Black Knight 4" Dia x 16" Long Filter Brushes - 6 Pack t5 Toggle controls - The FluvalWhat 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