I'm having a problem with my skimmer. It randomly overflows. I'll set it, it's fine for a week or so, then all of sudden, it's gushing water through the cup. It's in a constant depth area of my sump, so I know it's not the water level rising. My skimmer is close to overflow, so I though maybe a drop of water was hitting the venturi intake. I moved it so there is no possible way that water is getting in.

Anyone have any ideas?

Time to go skimmer shopping?