Think this weekend not good, as I have to travel. Let me do some pic taking to help you see it working. Will post them this tomorrow night.
My views: try not to allow bubble to exist over long duration in a tank, bubble normally exist when you use overhanging or in tank skimmer or over size skimmer for slump. It not only promote brown algae growth but also it will affect SPS and fishes health, in serious cases, algae will start to grow on your corals and kill them overtime. If you use MH lights, having bubble means your tank will be having increase population of cocepod, which means tissue death of corals exist in your tank. And your skimmer will appear to work excellent but in fact it is battling with increase growth of algae in the water flow and you have to spend alot of time cleaning your skimmer and tank off algae. If you are using 10000k or 6500k MH light, it is time for you to switch to 14500k or 16000k bulb to reduce algae growth and improve on visual for coral color. Don't read too much on kevin stuff, a tank is not a sea, we don't need so much growth in a small tank!!!!