As far as I know, no cold storage. Also, no terribly large bubbles in the joints. There were a lot in the seams. It's all cleaned out now. I'll post pics when I get home. Just ran out to HD and got a tube of GE silicone 1.resealing is easy I did my 75 a few months back. Having to do a complete rebuild is a job. You need to know 2 things. Did the tank sit outside in the cold? If so a complete rebuild is a must. I had a 300 split a seam after it was stored in the cold. #2 look at the joints for bubbles, if the tank seams are not showing major bubbles you may be ok with just a reseal