I have a 25 gal
that I couldn't find a stand to fit when I bought it, so I got a piece of plywood and had it cut to fit the tank and put that on the closest stand I could find. It's been there now for about 3 years with no problems. Mine hangs out about an inch on both sides but fits the stand from front to rear. If I were you though, I'd have the plywood hang out by the same amount on the front and back rather than have it all hang out on the back. Might cause balance issues. You can always paint or stain the plywood to match the stand so it won't be noticeable. I spray painted mine black to match the black stand I was putting it on.