I use fake vines in the tank for our larger BP. He used to climb in them when he was smaller, but he eventually got so big he tore them down a few times, and I don't think he even tries anymore. I still keep the vines in there for looks and to give Suki a better sense of security. If you want to give your BP something to climb on, I would recommend pieces of wood or thick grapevine, but cleaning those materials is a pain - we've pretty much given up on anything that porous.