California Quarry Rock (Quartz)
.5ton ~ 1ton Boulders
Marine concrete is a special formulated blend of cement that uses high levels of micro fume silica to bring the concrete’s pH to match that of sea water – it also reduces any potential of off gassing. The marine life created by the Fish Reefs remove more carbon that is ever released from making the concrete, so in the long run it is actually carbon negative.
The Fish Reef Units undergo a pressure test to ensure they can withstand the enormous amount of pressure at different water depths.