Is this CA media reef friendily?

[Covey]

I was shopping around for new calcium reactor media and noticed this stuff.
http://www.premiumaquatics.com/Merc...PROD&Product_Code=PC-CRM&Category_Code=cmedia

I was wondering if the collection of this kind of media is safe for the reefs. Dead coral skeletons. How dead is there some SE asian crew out busting up the reef or is this stuff collected responsibly?