100 micron is finer however will need cleaning more often than a 150 or 200 micron bag.  Felt material tends to catch slightly more than nylon mesh however requires more attention to cleaning

Features:

● Made from high quality durable polyester felt material on a plastic ring with handle, all aquarium safe materials. 

● For use in marine saltwater, tropical and freshwater aquariums along with other application which require a liquid filter bag.

● This filter sock can be cleaned and reused many times by simply turning inside out and spraying with a hose or in a washing machine.

● Perfect for using on your return pipe in your sump tank, will hold media such as activated carbon

● Ring width: 7 inches, fits all bubble magus rings + other brands

● Length: 9" short or 15" long (choose from above)

● Micron rating:  100 micron (0.1mm) or 150 micron (0.15mm) and 200 micron (0.2mm) for your choice

PACKAGE:

 1 x AQUARIUM POLYESTER FELT FILTER SOCK

Shipped within 24 work days hours of purchase via royal mail 2nd class post