Fluval Hose Brush – A flexible cleaning brush tool designed to scrub the inside of aquarium filter hoses and tubing. It typically features a long, slender coil with bristles on one end, allowing aquarists to easily push it through hoses to remove slime buildup, algae, and debris. Regular use of the Fluval Hose Brush keeps filter lines clear and maintains strong water flow, improving overall filter performance and water quality.