I use the filter socks from salt water critters, still by far the best filter socks... every 3-4 days I take them off, put clean ones on, then sit the filter sock in a bowl of water and bleach. Then I rinse it out with got high hot water pressure water, soak it over night in fresh water, and rinse once more. Tell a sniff, and if its bleachless then ready to go on again. Nice, white, clean, no bleach smell, and does not wear away or deteriorate the sock.