you just need to have very flat peices of rock and then some branches that I cur to fit.. Actually they really dont support the discs cuz there are rocks on the backside holding them in place but for added support and a different look I put the pillars in.I had so much stuff that doesnt do well in direct light so now I have nice cavity for shrooms and such. It's also nice to watch my tang cruise through the openings I have under the cliffs also.