What exactly does a skimmer do? ... like does it just swirl water around up vertically while pumping air bubbles to it and the bad protein fizzes towards the top... occaisionally needing to be emptied?
In your design.. how does the water escape back into the tank? like is it pushed out by more incoming water or do you have to prime it? I would be afraid if the pipe leading the water out got stuck or stopped somehow and then the water escaped through the skimmer collection box... or maybe I am confused beyond retardation...