all mine are basic 2x4 builds. They could be prettied up with stain/paint doors and what not. And not the prettiest of pictures. But only serve one purpose to me and thats to hold the tanks. My first one was for a 125 and I used 2 center supports.
I then built one for my 150 with just 1 center support.
Recently built one for my 120
and this one for a 40 breeder I started last week. And the only one that doesnt have a plywood floor.
these are all basic 2x4 kiln dried. But sturdy. with the exception of last 2 stands, I break my tanks down twice a year and move them, either into garage or into basement, so these stands get alot of abuse. If basement bound stairs get wrapped in cardboard and I just let the stands go. They get twisted, rolled, dragged,pushed, yanked, and even kicked. lol. And just as sturdy as the day I built them. None of the store bought stands would be able to tolerate my abuse, so i treat them very delicately. (goal is to replace them all) Theres lots of plans out there and this was the cheapest and simplest I could find.
Oldest stand was built in 2009 the one with 2 braces, other was 2010. Last 2 this year. This was the only year I didnt move them but will next year as I listened to a few friends and ended up loosing a few fish when I should have just moved them to a cooler room. Wife keeps taunting me with a 300 gallon, and if that ever does come to fruition, ill build the stand the same way, but most likely with 2 center braces.