What is the best way to move my fish from a 2ft mature tank into a 4ft new tank? I will be using everything out of the old tank in the new tank. I was going to take all the sand, caves, plants, filter and wood out and put them in new tank, leaving all fish in there while doing that, then take as much water as possible out to put in new tank, then move fish. Would this work? Would I need to bag the fish? Or would it just be like me doing a 50% water change?