Rio Nano Skimmer

[andresont]

Everything looks right on the pics.
Mine skim's better with higher water level.
Deeper intake does not differ much IMO, Because its already submerged. but surface skimming is the best way to pull proteins.
Tube "A" : i find it better when its just a notch lifted from closed (down) position.
"B" in my case is fully open.
one more thing, make absolutely sure to insert intake "U" tube completely down to the pump intake seat and make it tight.