Ok last Sept hurricane katrina shut off power to my house, and my 150 gallon tank, this killed all but two of my fish, an urchin, a few snails and such. I took the live stock, about 100 pounds of live rock, and most of the sand and put it in a 55 gallon tank as a running holding tank. The fish, rock, sand, and urchin have been doing fine. After getting moved in my new house I have now set my 150 back up, some of the sand is old sand that was just left in it since sept. Most of the sand was stored in the 55 during the past 5 months. I moved 100 or so of live rock from the 55 holding tank back into the 150 gallon. What should I expect? Will the sand and rocks that I kept going in the 55 start the 150 out ok, or will the old sand that was just in storage cause me problems?