At the least, lower the fuge walls to around half the tank height, add baffles on both sides of fuge chamber, at the outside of the fuge walls, about an 1 1/2 inch from fuge walls, stoping about an 1 1/2 inch from bottom, to about an 1 1/2 inch from top of tank.
Plus move skimmer to drain chamber.
This will alow micro bubbles to float out and allow water to flow over every thing to returns if baffles get clogged.
The deeper, from front to back, the tank the better. That allows the flow to slow down and time for bubbles, cheato and micro-orgs. to do their thing.