id go for the widest tank you could build. I wish I had gone wider than 24" . that's a score for the acrylic!
I like the idea of wider.... I am not sure about taller though. 24" deep is a lot easier to maintain than 30" deep. Does anyone else prefer 24" deep to 30" deep after having owned a 30" deep tank?
The 180g I am building the stand for already has holes drilled on the bottom that I was planning on using for the return after making a loop above water level for a siphon break. Since the 180 will eventually be replaced I am thinking of scraping the bottom return idea. Or maybe I should give the bottom returns a try as a test to see how well they work out for me.... hmmm....
How are returns done on most large tanks? My current 35g hex has an over the side return that outlets to the bottom and has a siphon break hole where it goes over the top of the tank. I like the water movement this configuration gives. Remember, my tank is going to be in a peninsula configuration with the over flow on a 24" tank side, not the 72" tank side.
P.S. the Acrylic was special ordered for a customer and the lumber yard ordered 8' sheets instead of 9' sheets like the customer specified. That is why they were trying to get rid of the acrylic.