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Filter media for mechanical and biological filtrationHighly porous ceramic exposes greater bacteria-colonizing surfaceIdeal for layering in canister filters - no mess media bagMechanical and biological filtration in one porous media. Ceramic cylinders trap debris without obstructing water flow. Their hollow, super porous structure provides superb surface area for bacterial adhesion. For freshwater or marine aquariums. 3/8" x 3/8" cylinders.Approximately four 8-1/2 oz. packages per liter. Approximately two 24 oz. packages per liter.Please click on "More Information" for FAQs regarding biological filter media.

Filter media for mechanical and biological filtrationHighly porous ceramic exposes greater bacteria-colonizing surfaceIdeal for layering in canister filters - no mess media bagMechanical and biological filtration in one porous media. Ceramic cylinders trap debris without obstructing water flow. Their hollow, super porous structure provides superb surface area for bacterial adhesion. For freshwater or marine aquariums. 3/8" x 3/8" cylinders.Approximately four 8-1/2 oz. packages per liter. Approximately two 24 oz. packages per liter.Please click on "More Information" for FAQs regarding biological filter media.

Bio-ball type filtration greatly enhances ordinary filter performance. SuperCartridge can permanently replace your ordinary filter cartridge. Replace the wastetrap refill regularly for premium mechanical and chemical filtration. Use with Whisper C, 1, 2, 3, 10-20, 20-40, 30-60, and Tetratec PF150, PF300. Wastetrap refills also available.

Bio-ball type filtration greatly enhances ordinary filter performance. SuperCartridge can permanently replace your ordinary filter cartridge. Replace the wastetrap refill regularly for premium mechanical and chemical filtration. Use with Whisper C, 1, 2, 3, 10-20, 20-40, 30-60, and Tetratec PF150, PF300. Wastetrap refills also available.

Bio-ball type filtration greatly enhances ordinary filter performance. SuperCartridge can permanently replace your ordinary filter cartridge. Replace the wastetrap refill regularly for premium mechanical and chemical filtration. Use with Penguin 160, 170, 200, 300, 330, 350, and Aqua Tech 20, 20-40, 30, 30-60. Wastetrap refills also available.

Bio-ball type filtration greatly enhances ordinary filter performance. SuperCartridge can permanently replace your ordinary filter cartridge. Replace the wastetrap refill regularly for premium mechanical and chemical filtration. Use with Penguin 160, 170, 200, 300, 330, 350, and Aqua Tech 20, 20-40, 30, 30-60. Wastetrap refills also available.

Bio-ball type filtration greatly enhances ordinary filter performance. SuperCartridge can permanently replace your ordinary filter cartridge. Replace the wastetrap refill regularly for premium mechanical and chemical filtration. Use with Emperor 280, 400. Wastetrap refills also available.

Bio-ball type filtration greatly enhances ordinary filter performance. SuperCartridge can permanently replace your ordinary filter cartridge. Replace the wastetrap refill regularly for premium mechanical and chemical filtration. Use with Emperor 280, 400. Wastetrap refills also available.

These cartridges provide advanced mechanical and chemical filtration using dual density mesh panels and Ultra-activated carbon.

Disposable cartridges to fit the full line of Whisper Filters.