Tecnoreef modules are made from reinforced concrete. They are manufactured using only natural components and do not contain synthetic additives. They may be assembled in a variety of combinations to create stable artificial reef structures on sea or lake beds. The basic Tecnoreef module consists of an octagonal slab with circular holes within the structure itself. The walls of these holes are inclined inwards.The slabs are connected together to form either a simple pyramid - the basic system - or more complex pyramidal structures. Visualise the technical overview.     Once assembled, the Tecnoreef system develops the following qualities: Stability Current Light Frequency     The Tecnoreef system consists of three modules, which are interconnected by special fittings and secured with only 3 bolts. The result is a remarkably strong and stable small pyramidal structure.     The basic Tecnoreef modules are rapidly and simply assembled in groups of three, to create small pyramidal structures.Adding a second, third and more layers on top of this first layer of elements is a simple matter. Any type of craft, from a rubber dinghy to a pontoon, with or without a crane, can be used to transport Tecnoreef modules.All operations, from loading the modules onto the boat to installation in the water, can be performed by a group of three divers.The Tecnoreef system can be assembled on the surface and then positioned on the sea or lake bed, or the modules can be positioned on the bed individually and then assembled. Each individual operation requires little time and consists in either laying modules side by side or on top of each other and then tightening the securing nuts and bolts.