Rapids Pro PS4 troubles

[busymum]

We recently bought a PS4 and are struggling with tweaking just right to rid our tank of the top layer of dust and junk. We have two Korillia 4's in a 92g corner bowfront. Read and reread the instructions over and over but they aren't much help. I've raised and lowered the Skimmer Overflow and played with air flow adjustment a bit but the surface is still not perfect. Any suggestions would be appreciated.

Thanks
Darrin and Toreen