Thanks for the info...looks like i'm going for a 600gph overflow and larger mag pump then.
Since i'm on the topic of sumps, if i'm going to be using it mainly for adding water volume and hiding equipment, are there any negatives to just using the tank without any baffles or partitions? I would have my skimmer in there, and maybe i'll throw the little pieces of
LR rubble i got hiding in the back of my main tank. Would it matter that it's not divided in to compartments, just overflowing, skimming and exiting all out of one compartment of water?