Dropped Carbon Into The Tank By Mistake

[cynos]

Hey all
I dropped a handfull of carbon into the tank today by mistake
I spent the guts of 2 hours trying to fish it all out but theres still a good bit left that went behind the live rock and under the sandbed.
How will I get it out or will it eventually just float to the top?
And will it do the fish any harm?
Ive a few fish and 2 feather dusters in the tank

 

[Pheonix]

although not an ideal situation its not the end of the world the carbon wont harm your tank, it will just get to the point where it wont be beneficial to the system anymore ie wont clean up your water for you.

most of it will eventually work its way out and when ever you see it just grab it