Walter Marine just received its newest patent in April. This is a huge milestone for us. This patent is for the inclusion/embedding of soft rock into an artificial reef structure. We invented/perfected a way to embed soft rock into the reef structure. This soft rock is the prefect PH for sea water, allowing all available marine life, including marine boring animals to populate the reef. For a complete description click on following link: http://www.freepatentsonline.com/7513711.html