Yes, it skimmed quite well actually.
The only thing was, that when I made this skimmer to my wife, I didn't know how the skimmer should actually work :)
I could not find any working blueprints for skimmers on the web, and there were only principles.
There were videos of commercial products how the collection cup is full of brownish and smelling effluent.
So after few weeks I decided to order couple of Tunze skimmers for her tanks, because there were so "little" of effluent in my DIY-skimmers collection cup.....well.....those Tunze's are skimming almost identically.
Actually I think that my skimmer was even better ;)
Well...this is a hobby of mine :)