When I rebuilt my sump, I had taken a lot of rock out of my previous DT. It just seemed too cramped. I also removed rubble rock from my previous sump. If I want to use that rock over again in my DT, do I need to prepare it and what process would I do? The rubble rock, removed from my previous sump refuge, kind of the same question except could I also place rubble rock in my DT? I, right now, have a refuge with sand and shells. The chaeto is growing really well and the algae is accumulating on the fuge walls. Would it be any advantage to add some old rubble rock to fuge? When I stored the rock I just allowed them to dry and I have them stored in glass tanks, no water I'm sorry, you are probably asking what does this have to do with the question "base or live rock? Ha. Since I have stored the old rock, is there any way to recognize if it was live or base? Does it not matter?.:question::mrgreen::bounce: