Aaaaaand so the 72 hours begins.I learned just how rusty I am with a caulk gun. Made one hell of a mess but easily cleanupable. Here's pics of the main corner getting most of the work. Once it cure I plan on turning the tank around so that corner isn't so visible and an eye sore.
I did get a little spooked when applying the clamp because as I was, I heard a crack but it turned out to be just a small piece on the outside chipping off so I'm not too concerned about it. I did back the pressure of the clamp off just a little after that.