I just picked up a new EV120 with a mag5. I read the directions which said to open the gate valve and air valve completely which I did. How do you know if the air valve is open since it doesn't tell you which side is open and which side is closed (horizontal or vertical). I assumed that it's whatever setting that creates the most bubbles? Right now, my skimmer cup is continously overflowing with bubbles. Is there something I'm missing? The skimmer is in my sump and the return water is above the sump water level. Thanks!
Rich
Rich