I have been looking a alot of tanks lately. I really want a 180g. (72x24x24) This tank is a great fit for my space, and would give me plenty of room to grow into. I would also like to have some tangs, and I read about them needing of at least 6 feet of tank.
While looking for 180s I have come across several 210s. The foot print is the same, but the tank is 5" taller. I know that this makes them a little harder to reach into, but that does not concern me as much as the lighting requirements.
How much more lighting is needed to pentrate the extra 5"? At some point I would possibly like to entertain having a clam, and I know that I would have to pentrate light to the bottom for the clam.
If the 210 is not a wise choice them I will stop looking at them in conjunction with the 180s.
(I feel like I am drinking from a fire hydrant right now. My heads about to burst.)