Quote Originally Posted by B3hustaf
what size would I need or would be recomended for the both of them once they are ready to live together. Thanks
Not recommended. You should house them in seperate enclosures.

(covered in depth here: http://www.ball-pythons.net/forums/s...highlight=cage )

How many hides are you providing now in the 20g? To decrease the stress that could be induced by too vast an enclosure you can try Adam's newspaper trick and fill the dead space with crumpled up newspapers to minimize the snake feeling too exposed (touched on here: http://www.ball-pythons.net/forums/s...paper+crumpled )