This AquaC got cleaned out good after it had gotten quite dirty, then after a while of tuning the air flow and waiting, I got good skimate like this
And I pretty much just leave it alone now. When the sump level rises, it doesn't skim as well. This is one reason I don't like AquaC.
This one is a Reef Octopus, brand new
I originally tuned it so that the top of the bubbles were exactly where they are in the pic, about 3/5 of the way up the cone. The next day it was starting to push a little foam into the cup. Treat it like losing weight, you don't weigh yourself 10 times a day. Set it and leave it for a day or two. Look at it, but don't touch. Make very minor adjustments if it is wet skimming, or not skimming at all, at most once a day. Once it gets rockin and rolling, you can adjust once a day and get it at the optimum level and then just leave it there.
Like I mentioned on the AquaC (bad skimmer IMO
) when the sump level rises, the outlet back pressure gets increased, and it doesn't skim as much. Conversely, when the sump level is low, inlet pressure decreases and it doesn't skim as much. I don't think the Reef Octopus or similar models that are of a newer or different design have as much of a similar problem, but what do I know. This is my first brand new skimmer and the AquaC was the first I'd ever touched.