I have a 30"x30" cube that is isolated from all of my system, and I'm in the process of setting up another identical one for the rest of my acros, as the first cube is now filled and I still have about 20 acros to remove.Also I am removing every bit of encrustation in the DT system. I am not treating in the tanks, I am removing the corals(from the QT cubes) for the dip in a seperate container, then rinsing in tank water before returning them to the cubes. My entire DT system will be acro free for at least 2-3 mos, and these corals will be in QT under observation for maybe 6 mos before any go back to the DT. During this time, after my first month of initial dips, I will dip a few of them every week, watching for anything. Again, I know that betadyne/levamisole probably will kill them at the right dosages, but to leave no room for error, I am going about this as none of the worms will be dead until they are dried up little boogers. I am not risking one of them surviving.