I am not sure how to get my skimmer to skim efficiently. I have a Skimz Octa SC1651 in a Trigger Emerald 34 sump. I, for the life of me, cannot get a consistent skimmate. How do I adjust the water level versus the airflow? What makes a wet skim versus a dry skim with the settings? My "œwet" skim is always clearish green, more clear than green. I see photos of dark green....how do I pull that much?