No, I got the 65 gallon version because I only have a 46-gallon aquarium. I will be using it as hang-on back, though, as I've never minded having several inches behind the aquarium to have access to cords, etc. I currently have 4 inches behind my freshwater, and 6 inches for the skimmer doesn't seem any more outrageous to me. My aquarium is going in between 2 easy chairs, so nobody will be able to see behind it that well anyway.
Quick update! I ordered my sand on the 23rd, it shipped the 24th, and this morning it showed up at my door on the 25th!!! I continue to be in awe of this company! They must have some super deal with Fedex, or they just blew all the profit they made on me shipping me 60 pounds of sand overnight!
38 Gallon (Freshwater): 1 Green Swordtail, 3 Yo-Yo Loaches, 1 Clown Pleco, 1 Blue Gourami, 4 Otocinclus, 7 Cherry Barbs.
46 Gallon (Saltwater): 60 pounds Lalo Live Rock, 60 pounds aragonite sand, 1 Coral Beauty Angelfish, 1 Peppermint Shrimp, 1 Mushroom Coral, 1 Emerald Crab, various snails and hermit crabs.
10 Gallon (Saltwater quarantine):