filter socks

[ramonareef]

on a filter sock what is a good micron higher number are a lower number?

[colindoug3]

a large number means more stuff will get through.

[Dakota]

I think the usual filter sock is a 100 micron filter; at least the ones I use and see used are. The lower micron socks plug up really quick.

[M. Parkis]

The one's I normally sell are 50 microns

[reef]

which size is better? What kind and what sized particles is this catching?