My biocube skimmer had an air pump with it and a knob that you adjusted to get more or less air. if thats the case I;d try to get less air.
My remora has a cup that adjusts up and down, Up for less foam, down for more wetter skimmate.
My eshopps has a handle that I turn to allow more or less air into the column.
Those are the only ones I'm familar with sorry. But I'm guessing it uses one of the three methods.
After adjusting the air flow though it doesnt happen immediately, you gotta give it some time. So do tiny adjustments and wait.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.