Looks like an excessive amount of baffles to me, I think you should be able to easily cut the number in half.
Also, it is usually more desirable to lay out the sump in this order; skimmer > return > refugium. You then feed the refugium with a T and a gate valve off your return so that you can control the amount of flow through the fuge. Typically we want the water to move a little slower through the fuge and setup the way you have pictured you will not be able to control that flow at all.
Just my two copper.
Brian
I can't stand micro bubbles so I tried to make as many baffles as posible to destroy their path! And I designed the fuge in the middle cause the flow is good and it keeps the Micro bubbles from traveling too far in the low flow before they hit the return.
