After 1 week in the new tank, things are looking good.
I have an ammonia test kit now, and after a few readings over 2.0ppm followed by partial water changes, his side of the tank just tested at .25ppm. I would like it to be lower, obviously, but I am happy to be approaching "healthy" range.
Today I saw him working on his first bubble nest. His fins are slowly regrowing and he hangs around at the top of his tallest plant and flares when i get near it. When I go to the other side of the tank (the food side) he darts around eagerly waiting for his new Bio-Gold to drop in.
No updated pictures yet, but i will post some soon so you can see his fin and color improvements.