The return coming from the main pump (which does about 5000 gph) goes through the Ocean Motion and the 8 returns go along the front blowing in different directions. I also have 3 gen X pumps for circulation.
As far as what type of reef tank not sure I think It's going to be a mix of everything.
Sean thats a nice job you scored. It must be fun setting up reefs like that especially when none of the money spent is yours What are you're plans for a skimmer?
Sean have you checked out the larger deltec skimmers? I've seen them run over 1000g systems with 200+ fish with ease. I know there are a few ETS die hards (including yourself ) but what is it about the ETS skimmer that you like? The ETS 1800 seems way undersized for a tank of that size IMO