I have a 40 Gallon breeder sump with no baffles in it yet. Couple questions. 1. Do I really need a fuge in the sump if I am doing a fish only tank? 2. Do you really need to install all the baffles....if....I have the returns going into a box/container in the sump in the middle that is slightly higher than the sump so it overflows/spills into into the 40 gallon breeder. Then the skimmer on one side and the return pump on the other side?