I have a coralife super skimmer also and it seems like I have to "break it in" everytime I change something (PWC
, top off, after feeding [which I power it off during feeding or it goes nuts], or powering it off to clean the collection cup). It seems more difficult to regulate than it should be. Since I'm fairly new to the hobby and this is the first skimmer I've ever owned I wasn't sure if it's the skimmer, or me. It basiclly has two flow controls. The first is a flow valve on the intake between the needle wheel and the chamber. According to the instructions this valve should only be used for the initial break in period and should remain fully open after that. The other is the water level control knob on the exhaust side to control the water level in the chamber. This knob is what you are supposed to use to control foam production. With mine, I find that I have to keep the water level control knob turned to the lowest point and use the intake valve to control the foam hieght or the collection cup with fill up rapidly, fast enough that I'm afraid it will start to overflow when I'm asleep or away from home. Eventually, after a day or so, it will get to where it functions like it's supposed to, after several "tweaks".
Not trying to highjack a thread but thought maybe this maybe common with Coralife needlewheel skimmers? Common with most venturi style skimmers?