My skimmer has been acting funny lately. I have only owned it for a few months, and about a month ago after I did a water change the collection cup was filling up with water within an hour. I thought maybe something in the water made it act up so I left it off for a few days to let everything settle. Well it kept filling up extremely fast so I did a 50% water change hoping it would fix my problem. Not so much. At first it seemed like everything was ok, but it started filling up extremely quick again. This is with the collection cup sitting at its highest point which should be extremely dry skimate. I have even cleaned the skimmer and the pump. any ideas?