While on a camping trip in the Texas Hill Country, I drove by a guy's house whose front AND backyards were completely covered in Texas limestone. I started drooling at the possibilities aquarium-wise, and ended up buying the 4 rocks pictured for $40, roughly 160 lbs. total. Apparently he had been collecting it off private land along the Blanco River (with permission) and selling it to a wholesaler, who had stiffed him for $17,000. So he was happy to get the $40 and I was giddy with my purchase.
I want to use the one pictured at the top as the centerpiece in a 125-gallon tank, but I'm going to have to alter it a little. As you might notice, it only touches the bottom on each end, and doesn't really stand upright. I'm going to have to level it off somehow, and I'm not really sure how to do it. Does anybody have experience with such a project? Any suggestions? I've also though of planting each end in a fish-safe cement or something, to give it level feet. Is there such a thing?