Wayne brings up a good point that I forget to temper my comments with. If your interest is a bigger swim area for your fish, then the 135g may be the way to go. A 72"x18" footprint would make an awesome FOWLR tank. It's just that if your interest is "reef" then the 120g is the way to go, for the reasons stated.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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