"thanks for all the info guys, what grain of akadama should i get, and can i put something on top of the mix to make it look soily"
Forgive me, but you don't need Akadama for this tree. You're going to pay a premium for something that really isn't going to make all that much diffference. You'd be spending smarter money on regular old prepared bonsai soil from an established vendor. Akadama is NOT necessary for any tree. It is a luxury mostly, especially if you're in an area where it isn't readily available. I'd also mention that it takes some time to understand how to manage Akadama watering and growth wise. Additionally, if you're in an area that experiences winter freezing, you will not only have to know what grain size, but will also have to find the high-fired Akadama. There are different grades...although all are relatively expensive and VERY expensive compared to regular bonsai soil.
The softer stuff doesn't hold up well to freeze thaw cycles and can turn to mush in a while...
some people swear by the "drainage layer" idea... of which I personally don't give much thought 
