PrimeAgra Ceramic Growing Medium fine vs coarse

[herfy]

PrimeAgra Ceramic Growing Medium fine vs coarse

Just wondering if there a difference in grade
other than the Obvious
fine smaller......coarse bigger...I think
I want to try this but not sure what to get,the fine or the course

I understand that the bigger might get better air flow around the roots

The smaller would be more compact and tight together.

But with that being said i guess im still stuck in the middle of what to get...