Sump help please?

[Johnny Reefer]

Originally Posted by Redrover

What's the filter pad doing laying over top of your baffles...? What's the wood doing under first baffle...?

I second these questions.
They way it looks to me, those pieces of wood are blocking your water flow. Consequently, it is just flowing overtop of the two baffles. It's also likely not flowing through your carbon bag either. I suspect the filter pad is an attempt to reduce turbulence and, thus, microbubbles? I suggest getting rid of the wood. Then your water will flow as it should...under the first baffle and over the second. Your microbubbles should reduce during this water path. Replace the wood with "eggcrate" if you still want to use the carbon bag that way.
Also, can you raise the water level of the third chamber and still maintain adequate reserve in the event of a power failure? If so, I suggest raising it to just below the top of that second baffle.

HTH.