I'm getting a new enclosure in about 2 weeks and it will be big enough to hold two tegus. I only have one right now but I was worried about his reaction if I put him with another tegu. He was raised by himself and is still a bit agressive (I'm trying to work on that). He's getting close to 3 feet long so I'm sure he could do damage if he wanted.
Should I let him get used to the new tank for a few weeks first? What would be better as a partner, male or female? What size should the other tegu be?
Any tips at all on how to do this would be greatly appreciated.

