hey everyone, i want to have a safe way of attaching my live rock in my 75 so they wont fall and break through the bottom. my tank is going to be barebottom

i was wondering where to either get acrylic rods and how large to drill the hole or what type of glue can i use? i heard someone mention gorilla glue on this board; would i be able to break off the rock in the future if i ever needed to remove some pieces?