This thread is a perfect example of how people cannot get realistic answers because people disagree about tanks sizes. Don't forget we are taking these fish out of their natural habitat and putting them in a tank for our own viewing pleasure, you are arguing over tank sizes that are preferred by others and saying the fish will not be happy. let's not forget the fish will be far happier in the ocean where they belong. But if adding a extra foot makes you think the fish are going to be super happy go for it.
" Theres never too much filtration!"