Thanks for all the thoughts and offers to help.
As most of you know, I bought it through my LFS, as required by A.G.E. It should still be under warranty. The LFS owner texted the new manager of A.G.E. yesterday to ask about the leak around the front eurobrace. Upon my discovery of the leaking seam this morning, she called him at home.
We are awaiting instructions, but I am going to draw down about half the water in the tank, in order to minimize the chances of a "blow out". I have turned off the closed loop to reduce turbulence in the tank. I'm going to need some storage to put live rock from the display tank. I hope to transfer my prize fish either to LFS or another temporary tank. I am pretty sure the tank will need to be torn down and repaired onsite, but who knows? These hybrid tanks can be tricky, I think.
LL