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Aquascape® UltraKlean™ BioBalls™ are designed specifically to trap dirt and debris when used in conjunction with Aquascape UltraKlean™ Pressure Filters. UltraKlean™ BioBalls™ sink and provide a textured surface ideal for the colonization of beneficial bacteria in submerged applications.
(250 - .75" BioBalls™ per 1.5 lbs. package)