I started using a skimmer sock this year. Initially, I was having some sealant applied to the concrete deck so I wanted to minimizes any of the sealant getting to my sand filter. But when I saw all the gunk it caught, I will continue to use them.

My pool has a vacuum port on the side pool wall that by-passes the skimmer when vacuuming. I'm considering putting a sock on my pump filter as well. Any thoughts?