Hey fightingfeeders. He rescues big fish that have grown too large for their tanks, such as oscars and pacus and others that get huge.
There are many people out there that start out with a little bitty oscar and don't realise how big they get, then need to rehome them. They don't really have a lot of options if a fish store won't take them, or they can't find someone with a huge tank.
Jonathan takes them in and has this huge tank that is just the right size. He tries to adopt them out/rehome them, but his main focus is saving big fish that would otherwise die slow painful deaths. He had a big tank before, that he had to replace due to a leak, and decided to redo it even bigger with even more room for the big guys.
If you look back over the post, I think on page 1 or so you can see pics of his previous tank with big fish.
The sister site to this one, monsterfishkeepers.com, has members with big tanks with big fish to give you an idea of just how large these guys can get, and how big their tanks need to be.
You should go take a look at that and you will see some incredible pics of incredible fish and tanks.
As for the braces, I plan to coat them in pondarmor, but the braces going from front to back are maple, and the one going from the left to the right is indeed treated, but I'm not worried about poisons... 
