David S
Aquarium Advice Addict
the baffles are there to stop any micro bubbles going back to the DT from the skimmer ,with the baffles as in the picture the bubbles could get dragged down with the flow as the flow is stronger at that narrow point compared with at the bottom of the tank.if you see what I mean,I still have the original fuge which has been running for about 18m I sold the new model to a friend and never changed it.