wanted to run the skimmer a few days before answering. It is a omega 150 vertex. I checked the reviews online and some people complained about not be able to get it adjusted properly. I placed the skimmer in the sump and after a couple of days it was producing good skimate, I have not adjusted anything to be honest I am not even sure how to adjust it. I am running a ATO that keeps the water level in my sump very consistent, Only thing I can think of is the people that are having problems don't keep there sump water level consistent. Though the first week of running it I am very happy with the noise level the skimmer makes an air sucking noise that is barely audible and with the amount of skimate that is being generated. I am not ready yet to say it is outperforming my old skimmer RS-80, but I think in the next few weeks I will be saying that it is better.