I contacted Marc of Melevsreef and this was his response.
Yes, I use 1" between the bubble trap baffles. If you prefer 1.5", that works too. The center baffle is 1.5" off the base of the sump.
Odds are your problem is too much flow through the sump. The return pump should only move 3 to 5 times the volume of the display tank. Since your sump is a cube, I have to imagine that the tank is small. Add to that is the fact that your sump isn't long laterally, so airbubbles don't have time to rise and pop. Did you put a corner bubble tower in your sump, to trap the bubbles before they even enter the water in the first place?
Marc
I am going to assemble a bubble tower similar to Marcs designs and try that out. For the time being I will just turn down my return pump and see what affect I get.
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If it is just us,
It seems like an awful waste of space.
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