The CaribSea Life Rock Arches consists of real aragonitic base rock, not cement. Requires no curing. These arches have extensive macro and micro-porosity infused with spored bacteria for outstanding biological performance. No curing required, clean and safe for all fish and inverts. Environmentally responsible and each piece is unique.

• Infused with beneficial bacteria
• 20 lbs box contains 4 rocks approximately 12" long each
• Safe for reef or hard water aquaria
• Each rock is unique and is a natural product