Adjustment need to be made in a tank by tank basis. It can fluctuate greatly by how heavily you are stocked, water parameters, etc.....even what you feed. I have my skimmer on a timer to shut off for 3 hours daily during feeding time. Zooplankton, Marine snow, rotifers etc can increase production on the skimmer.
30 Gallon Bowfront Saltwater
Scooter Blenny, Banded Shrimp, Damsels, Basslet
55 Gallon Freshwater- Asst Community
55 Gallon Freshwater - African Cichlids