Yes thats a weeks worth. Still a little liquid for my liking, so I am going to lower the outlet pipe a touch more. The skimmer is flat on the bottom of my sump, the water level in the sump is 220 mm. I have adjusted the outlet so the air/liquid level can just be seen above the black ring. I hope that makes sense?rod , did u get that skimmate in the first week ???? can u tell me what height etc did u put it at ???