That one looks like it has a attachment for a airline right by the suction cup, so you would just need to attach a airline to it. If it didn't have that you would have to run a air line and airstone down the tube. Sponge filters work by the bubbles rising up, as they rise they pull the water up with them. So the water in the tube is flowing through it with the bubbles. Water is then constantly pulled through the sponge to replace the water that is constantly being forced out the the tube by the rising bubbles. The sponge area is were most of the bacteria will colonize.
A helpful link