
Certainly not the same. One could argue the former is great, but wouldn’t it be awesome to have a tank where fish swim along the entire 12-foot span? The two six footers in my basement are great and I am happy, but that 12-footer would simply be awesome!
Funny how we always want a bigger tank. It is amazing how large a tank looks when it is empty. Then you fill it up and place a couple of rocks or driftwood; not so large anymore, usually.
I suppose I never really have a big tank; my largest tank was a 6-foot 150 and I don’t have it anymore. I did have over 30 tanks back then (mostly 3-footers) when I was into discus.
The current ‘large’ tanks I have are two six footers. For a long time one of my favorite aquarium sizes has been the standard 75gal (48 x 18-inch footprint); I still have 2 of those. Wouldn’t it be swell to have 3 of those next to each other for an 18-foot span? But would it be better to have an 18-footer, even if it wasn’t wider or taller? I guess I will never know as no tanks larger than 6-footers may be coming my way in the foreseeable future (and even at that size, I don’t see any coming soon).

Cheers to you ALL with the big tanks!