Has anybody used this product? It is designed for aquaria. It is reputed to be a dense form that you can create into any shape size or angle. It is designed to create your own landscapes.ie caves etc. I was thinking of purchasing a can of it to create a few caves for my plecs. The have only bogwood caves at the moment. Before outlaying quite a lot of money for a small can I was just wondering if anyone out there has used this product and if you would recommend it.