Here is a solution that I hesitate to even mention - BECAUSE I KNOW IT IS NOT THE CORRECT WAY - but I was faced with this same situation a dozen years ago, after getting my 140 up and running. I developed a drip at the same connection at the bulkhead as you have. I did not want to cut out the the bad connection and re-do the plumbing. Sooooo, I wrapped the joint in 2-part epoxy putty (comes in a roll at Lowes or HD) and let it dry. If you do choose to do this, make sure you knead the putty well, so it mixes properly. The surface has to be completely dry, or it won't adhere well. Also keep in mind that when you tear down the tank, you will have to cut the plumbing and the bulkhead to get it out.The connection remained leak free for 12 years, until I recently took down the tank and I had to cut the bulkhead and PVC to remove it.
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I might do this, is it possible though that the leak will just travel somewhere else when I seal it up?
This is what I’ve caught after 36 hours

