http://www.ball-pythons.net/forums/member.php?u=955
This is the guy to ask.
I am not to up on Iggys but I'm sure he needs to be in a seperate setup asap.
I am a little confused about your term "in with a larger iguana". You also said that they are BOTH in a ten gallon? I sure hope you know how big they are going to get.
Good luck,
Jim