if i had to guess, i would say that you'll be receiving a box full of a dozen dead piranhas on tuesday... i'm sure the box has been hot as hell, the ammonia levels are deadly by this point, and they love to eat each other during the shipping process. i've seen crazier things happen tho, so who knows... if you still want to try to get the tank ready just in case, you can try doing what i said earlier, i've gotten tanks ready within a day or two during an emergency.