filter socks

[shannon32]

so I just hooked up my sump and had everthing running good skimmer was getting nice green goop lol life was good but when I added a 100 micon water filter sock my skimmer went on over load and foaming over and the skimmer is at the highest setting for hight any thoughts I removed the sock and shut off my return pump should I have washed the sock out first ?