I got a tank from someone that has been sitting in his shed for a couple months in the cold. Do you think that the cold and temp changes would have affected to seals? If so is there anything i can do?
Fill er up. That will be the easiest way to tell if it leaks. Unless you obviously see the silicone just peeling off or missing. I would recommend doing this outdoors if possible, it's no good having a 55 leaking in your house and you can't move it until it's all drained.