my brother in laws bubble had a baby (clone) he said it just fell off of it!!! but I do have a question, do you have a lot of bubbles on top of your water? some times they will build up in the corner of the tank at the top, not real bad though. very bubbly when I put new water in.
This is from not having powerheads pointing upward towards the surface. Breaking the surface tension of the water plus good water circulation is why the protein sum builds up over time. That's why most saltwater tanks use an internal/external overflow and sump.