Can you dial back the flow of the pump inside your skimmer and adjust the air /water mix to make up the difference. That should force less air bubbles out of the skimmer.
I am not sure if the Nyos has the option to dial back the pump. I will have to dissemble to find out
I do have the option to control the air / water mix - opening up or closing the air valve doesn't appear to have any impact.
Could it be affected by having the Skimmer on some eggcrate?
Is there anything I should place in the area before the return pump to remove/filter the bubbles out?