PreFilter 4" (200 micron) Draw

200-micron prefilter sock

Ideal for removing detritus and waste before it goes through filters and return pumps.

Perfect for trapping uneaten food, waste excreted by livestock, decaying plants, detritus, dust, and other floating particulates.

Changing filter socks regularly will increase water quality by removing solid organic compounds before they continue to break down and adding additional nutrients (which can increase algae growth) to your aquarium water.