Consider using the widest aquarium your space and budget will allowI wouldn’t exactly say I have major regrets about choosing a standard 125-gallon tank for my current marine aquarium system, but if I had to do it all over again, I might go in a slightly different—rather, slightly wider—direction. For the benefit of any salties out there who are planning a new setup, I thought I’d share why I think going with a wider tank might have been a better choice. First I should specify that aquarium dimensions are typically given as length x width x height, with length representing the side-to-side measurement and width representing the front-to-back measurement. This always throws me because to my way of thinking, width should describe an object’s measurement from one side to the other. After all, when I look at my reflection in the mirror, I don’t think to myself, “Wow, my belly sure is getting long!” And there’s a reason ABC’s old sports anthology series wasn’t called The Long World of Sports.But I digress. This aquarium—which is 18½ inches wide (counting the trim)—has been operating for the better part of 10 years and functioned as a FOWLR system for most of that time. The tank serves as a room divider, separating the great room in my home into two distinct sitting areas, and is viewable from three sides. I only recently converted it to a reef tank after tearing down my 75-gallon system, which, as I’ve mentioned in prior posts, had become largely overrun with green star polyps and pulsing Xenia.