So when I got into this hobby about a decade ago, I start off with a 90 gallon glass, rectangular, rimmed tank. Standard footprint of 48"x18"x24" with a middle support running across the top. It was drilled in the back (by the original owner) for overflow. And with eighteen inches of depth it offered plenty of room for me (or so I thought) to aqua-scape. However, now that I'm back in the hobby, after eight years of being out, I'm seeing less and less traditional style aquariums; and more square shaped rimless setups. I'm fully aware that virtually any tank can be turned into a reef tank; but I'm just curious how many people still use the standard rectangles of old? Trust me, I see the value in the cube shape, as it tends to offer more real estate for creating one's reef, than an equivalent size in the rectangle shape. Honestly, the only thing rectangles seem to have going for them anymore is the swim space for fish who like to dart back and forth. Thoughts?