I see them at our Home Depot all the time. I didn't know they were that sturdy though. You know, to hold the wait of 3 tanks. And they look like 20g highs too. So without the decorations inside i would say about 480 pounds of wait on the shelf if you just had water in them. So that is alot of wait on the shelf. That is kinda scary. But if it holds up then that is awsome. I would still say that i would use the bottom shelf as a QT, storage, or a sump for a couple of the tanks.