Skimmer Help

[dusty16]

I have the Vertex Alpha 250 and I have been having trouble getting it to produce some sludge for me. First time using a skimmer so I tried figuring it out but I cant seem to manage. Water depth it at 9.75 inches so that shouldn't be a problem. I watched some videos and tried to copy the settings in them but it didnt work. Any advice on how much I should open up the air intake thingy and where I should set my water level would be appreciated.