Im getting ready to set up my SPS tank and Im doing a bare bottom tank and want to make sure the rocks arent going to move on me. Im just not sure how to go about doing this. Ive seen people drill the rock and use PVC or rods but that seems like a lot of work. Im leaning more to using bonding/mortar from marcorocks. What do you guys use for your rock work? Is there a better epoxy or mortar that works better than that one? Oh and the rock will be dry rock and Im going to do all this before filling the tank. Thoughts would be great. Thanks!