Sure does. the exaust tube stops about an 1/2 inch above the perlight level on the inside.

Made a couple simple modifications since pic, #1 I got rid of the light as it was not really needed since fruiting temps (so I am told) should be in the mid 70F's. #2 I replace the air pump with a much larger model to increase air exchange. I noticed that with the smaller pump, the cakes fathest away from air supply were fruiting much smaller than the ones up close to the air inlet. New airpump is a $20 Walmart Version for 50 gal aquariums.