Instructions
Clean your Rio Nano skimmer before placing it on the side of your tank, to remove unwanted oils or dust from manufacturing.
Turn the leveling knob on the back of the skimmer to optimize its effectiveness. Plug it in.
Prime your skimmer, with the water level in your aquarium at about the bottom of the black base, by pressing and holding your finger on top of the Venturi tube, located on the top right of the intake tube. Water should fill the intake tube and begin to cascade from your skimmer at the bottom left outflow.
Make slight adjustments to the skimmer flow by turning the knob at the top of the intake in small increments clockwise (about one-half inch every few hours).
To reduce bubbling in the rear collection bin, pop out the plastic barrier at the outflow where the water begins cascading into the aquarium.
Increase bubbling in the bin by slightly loosening the nut at the bottom of the Venturi tube and gently pulling up on the tube about one-quarter inch and waiting for at least an hour to gauge for changes. Continue to adjust the height of the Venturi tube until you get the foaming you desire. Tighten the Venturi tube nut when your foaming is optimal.