Well, my whole big long conversation about finally getting the tank apart was deleted, so I'll have to remember what I wrote. I'll be short about it this time.
Top euro bracing - Completely demolished by my hammer. It came off really easy after that.
Rest of the tank - The seams were so close that you could even get a razor blade between them. We used a 2x4 that was cut a bit longer to wedge the seams apart. This worked really well. I wouldn't try this on small tanks, but for 3/4" glass, it was surprisingly effective.
I had to demolish a few other bottom bracing pieces to get the tank apart, but nothing that can't be replaced rather easily. The important part is that the big panes are still in tact.
I'll post pics up shortly.