Simplicity Felt Filter Sock with Plastic Ring 4" and 7"

200 Micron Felt Filter Sock with a plastic ring.

 Benefits:

• Regular use will result in crystal clear water most convenient form of mechanical filtration.
• Remove excess food, detritus, organic waste, dust and other particulates
• Convenient form of mechanical filtration
• Prevents larger objects like sand, crabs and snails from damaging pump motors
• Reduces ammonia and nitrate producing organic waste
• Increases filter life