I'm sad to report that I believe he's on his death bed. I filled up a giant rubbermaid tub to put him in. He needed to be separated because he developed a nasty bacterial infection on his side. I went to net him and he flew 4 feet out of the water, slammed onto the lid, flopped across all 8' of the tank, off the wall, and flopped around on the carpet for a couple seconds before I grabbed him and placed him in the tub. He's alive, but suffered a fair bit of damage. He's being treated with Kanaplex and a little salt. There's an air pump, heater, and a seeded sponge in there. He doesn't eat so the mess should be minimal. A water change every 2 days should be okay. I'll keep reporting back on his status.