I want to build a basic but secure rack for 2 large fish tanks. Everything I find are for cupboard stands for a singe tank. And looking at them designs It would take up the place for the tank on the lower shelf. I would like the bottom tank to be at least 1 foot off the ground. My tanks measure about 84″L x 24″H x 24″W And I would like to stack them if I could. Does anyone have any idea how I could do this with 2x4's or something? Thanks