Tanks looking great, loving the sump work (lashed out and bought a couple of MP40QDs by the way
).
Not sure its intentional, but I am wondering from a filtration point of view if you are looking to get copepods/fauna out of that fuge for your aquatic residents. As it stands it looks like you are filter bagging your outgoing from that part of the system, which means you are probably losing out on a lot of this potential. Just something to think about in terms of the outgoing flow.