BioTek Marine Felt Filter Socks are the best quality filter socks on the market.

BioTek Marine Felt Filter Socks

Instantly improve your water quality with the BioTek Marine 100 or 200 micron filter socks. These highly durable mechanical filters help trap uneaten food, free floating particulate matter, micro-bubbles, and even dust from your aquarium.  Pre-molded with internal plastic handles for easy servicing and double stitched for maximum durability, micron socks are truly the BEST upgrade to your filter/sump for polishing water. The result is higher quality aquarium water.

4" FILTER SOCK FEATURES:

• High Quality Double Stitched Felt
• Available in 100 or 200 micron Pore Sizes
• Pre-rinsed for Instant Use
• Made in USA
• Internal Plastic Handles for Convenience
• Size: 4”x 14”
• Fits Standard sized 4" Filter Sock Holders

7" FILTER SOCK FEATURES:

• High Quality Double Stitched Felt
• Available in 100 or 200 micron Pore Sizes
• Pre-rinsed for Instant Use
• Made in USA
• Internal Plastic Handles for Convenience
• Size: 7”x 17”
• Fits Standard sized 7" Filter Sock Holders