Got my hands on my filter socks shipped directly from the states. These are 200 micron filter socks, so efficient at removing detritus that I need to clean mine every 3 days to prevent it from clogging. Limitations of the usual filter wool is that once it gets clogged, water tends to flow around it rather than through it.
Cleaning is simple, soak in bleach for 24 hours. Wash it till there is almost no chlorine smell and leave it to air dry in the sun for 24 hours. After which it can be used again.