Best of luck with the move Robinson. Loking forward to seeing the new tank. I have a question about gary's sugestion being that I will soon be in the situation. I havea lot of ministars, copepods, worms etc. which I would hate to lose by throwing out the old sandbed. Is there any danger in keeping at least some of the old sandbed to "seed" the new substrate. In my situation, since the new tank is going into a different location than the present one , I can take some time and gradually transfer the subtrate to prevent a major new cycle in either tank. Again, good luck and holler if you need a hand.