I have a lot of thin slate from a roofing project that was never finished by the previous homeowner. I've never used rocks beyond aquarium gravel, and I'm semi-paranoid that if I make a rock pile, it will tip over and crack the glass. I realize that I learned to stack blocks as a toddler and that tons of people scape with rocks, but hey, we all have our quirks. I have a big fake Texas holey rock in my new 29g and the fish love it, but I'd like to add more hides/line-of-sight blocks. The substrate is sand and the current residents are peaceful, but I want to add plants and wood or rocks for more baby shrimp hides. I'd love pictures and tips for using rocks. Thanks!