Thanks ! Yes, no socks. I don't like having to change them every so often.
Here's a pic of the sump
The fuge is a separate 20 gallon high, that flows into the return via gravity. The middle tank is a 40 gallon breeder, which is split to house the return on the left side, the skimmer on the right, which is where the drains are. The right tank is a 20 gallon high, which is my ATO tank