Aragamax Grand Bahama Sand contains a majority grain size of 0.2-1.2 mm, but with additional bits of reef sand and small shells to recreate the Carribean reef "Rubble Zone". The larger bits of aragonite not only add color and texture, but allow burrowing organisms to buttress their tunnels and prevent collapse.

CaribSea Aragonite buffers to the highest pH and delivers more calcium, carbonate, and trace elements than any other substrate.