Jason DeCaires Taylor the creater of a huge underwater museum, he uses marine concrete so reef safe, his goal is to restore the reef, we should go scuba diving and check it out. We should have him as a guess speaker he's been doing since 2006 major props
His web site http://www.underwatersculpture.com/
His web site http://www.underwatersculpture.com/
the closes one to us is in mexico you can email him 
