Hi, I've got a 75 gallon tank that's about 15 year old. I was draining it the other day and realized there was some air pockets in the seal itself and it wasn't in one area. It was all the way around the whole bottom seal. Anyone ever experienced this at all? Should I be worried about the integrity of the seal? And I should also add, it's a factory seal. Hasn't been re-sealed before. Any help is much appreciated. Thank you. 
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