What are folks using to make rock walls? Styrofoam (?spelling) and grout? Something else? I sort of inherited a snake tank, that's huge. After cleaning,sterilizing and getting it to fit into the room, its still about seven and half feet long, by about three feet, by two feet high. Lot of space. I'd like to put in a rock wall, but was wondering what people are finding works best.
Thanks in advance





-Lauren