Biological filter media encourages beneficial bacteria growthPorous ceramic cylinders boast increased surface area for better filtrationPerfect for fresh or saltwater canister filters for cleaner aquarium waterBiological filter media designed specifically for Fluval Multi-Stage Canister Filters. Porous ceramic cylinders encourage beneficial bacteria growth to help eliminate harmful ammonia and nitrite levels in your aquarium water. Cylindrical design allows a large population of bacteria to grow in a minimal space while pores are perfectly sized for bacteria colonies. Great for fresh or saltwater aquariums. Each ceramic cylinder measures approximately 5/8" dia x 3/4" long. 17.63 oz box contains approximately 100 ceramic cylinders - perfect for most mid-sized (approximately 1-1/2 L) media baskets. For best use, place at the end of the filtration process. Please click on "More Information" for use, cleaning instructions, tips, and product specifications.

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