yes. I believe so. I definitely was suffering from the common newish-aquarium issue of low nutrients. diatoms (and at one point cyano) were the prevalent rock growth. softies lagged. refugium didn't flourish at all and most of my macros in it died back. everything was somewhat blah.
I pulled the sock, but kept the skimmer going. I have seen my Nitrates rise a bit and the zoa's in particular are more extended now. polyps look good. my toadstool is showing his green more. Diatoms and cyan has been largely replaced by proper green algae dusting. refugium macros are actually growing now. Nothing is overgrowing. so I'd say its working. Could be anticdotal though. Definitely not a scientific test.
The drawback is that the water clarity suffers. So I put the sock back on for a few days. and that fixes it. I should come up with something more consistent though. maybe a higher micron sock?