I started to post this a few days ago but decided to give the
skimmer more time so I could see if it was consistent. Just to note this is on a 75 gallon mixed reef and the
skimmer was set up without the air silencer and without the bubble trap. I have seen that a few people on other sites modded there impellers with fishing line. So started with that mod. Fairly simple to do. All I used was some 6 lb. fishing line and wrapped the crap out of the impeller. It definitely seemed like the bubbles were smaller, but I didn't seem to get anymore skim mate.
Now the other thing I did was added a new
skimmer return pipe. Ever notice that your skimmed water dumps pretty much right back on top of your
skimmer pump? Every get tired of all the micro bubbles that your CSS dumps? How about all the salt creep? Well I have my return going back to the first chamber of my
sump.

I was somewhat worried about too much back pressure on the
skimmer. But it seems to be working. In three days I get about a half gallon of dark nasty stuff.

This is where I have my water level set. As you can see I have my water level set just at the neck of the collection cup.
Next mod I think I will try is a home made venturi with larger air line. Then possibly a pump swap using a sedra with a mesh mod. I know a few of you out there use these
skimmer so I hope this helps you.