The Nepall Fluidized Bed Water NLH-600 is a 22cm aquarium filter system that uses fluidized bed technology to provide efficient biological filtration. The transparent chamber allows easy monitoring of the filter media while the suction cups enable secure mounting. Key features: • 22cm length for space-efficient installation • Transparent chamber for media monitoring • Suction cup mounting system • Fluidized bed biological filtration • Durable plastic construction The fluidized bed design keeps filter media in constant motion for optimal surface area contact and biological filtration efficiency. The filter can be mounted horizontally in aquariums using the included suction cups. Regular maintenance involves occasional cleaning and media replacement as needed.