This photo shows the view looking into the skimmer box from one of the
short ends. In the foreground, you can see the remains of the
injection tube, both at the bottom and at the top of the
photo. Further toward that back of the skimmer box, you can see
where there used to be a baffle that was supposed to decrease the
quantity of bubbles that exited the skimmer through the water
output. I cut out the baffle because it just made things worse.