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:
7″ FILTER SOCK FEATURES: