Earlier this year we bought the J-345 as our first hot tub. I had noticed what I thought was a small leak in a couple of corners of the tub. Turns out it was not a leak at all. Can't remember for sure, but I think it might have been a little bit of water from the small line that draws air into the air injectors??? Again, I am not 100% sure of this. In any case, what I originally thought was a leak in two of the corners turned out not to be a leak. Not sure if this is the same as you are experiencing???