Low Maintenance: backwashing is quick and easy! Reliable: no internal moving parts for long lasting service. Longevity: media never needs replacement. Superior solids removal: remove solids effectively with ease. Excellent biofiltration: large surface area for nitrifying bacteria. A popular product in multiple industries and applications, the Bubble Bead Filter by AST offers easy maintenance and effective filtration. Perfect for aquaculture systems, research applications, quarantine systems, broodstock holding, and more. In addition to solids removal, these filters provide biological filtration, breaking down the nitrogenous wastes into non-toxic substances. Our gentle backwash removes the collected solids while keeping the necessary bio-film intact.