Just purchased my 120G tank! This is going to be my biggest reef ever (in-fact... my biggest tank!) - I am looking for some advice regarding filtration. The tank is drilled with an overflow & I plan to run a sump. My question is can a 40G tank with a protein skimmer etc in it work without bubble walls? I have an old 40G tank I plan to use as the sump. I could acrylic some glass pieces in as baffles if I have to but is it necessary? Trying to do the sump on a bit of a budget but I don’t want to skimp out on anything! - Thanks!