Step 1 Aquaclear Filtration System filters fine particles out of aquarium water For AquaClear 50 and former model 200
· Mechanically filters dirt and debris
· Tailored fit prevents bypass
· Large capacity for waste capture
· Porous construction provides numerous bacterial attachments
· Long lasting and reusable
· For fresh and salt water use The AquaClear Foam Filter Insert provides mechanical filtration by trapping particles and debris in addition to providing biological filtration. Exclusively designed for the AquaClear Power Filters, the insert is safe for fresh and saltwater aquariums.