Dead coral safe or not

[Blondek727]

Ok I have a hunk of dead coral that has been siting in my front yard for a very long time and I was thinkin about putting it in my aquarium but at one time along time ago like maybe 10 years it might have been bleached but don't know for sure anyways would it be safe to do this

 

[melosu58]

If it ever completely dried out then it will be OK. If it`s been sitting in the yard I would think about boiling it some water and then let it air dry.