I wish I had found this forum a few weeks ago, it could have really saved me some time. I recently purchased a 1998 Hot Springs Grandee and have located and fixed 2 leaks (around the light lens - replaced with new, and the air intake nipple above one of the moto massage - sealed with plastic welder). Both spots have been leak free for more than a week. However it seems that a 3rd leak has started, much smaller than the first two (1/2 inch of water in 3-4 days) The concrete pad is wet under the filter basin corner. I have been unable to find any wet foam from the sides. Any ideas??