Caribsea Life Rock Arches for Reef Aquariums 20 lbs (4 x 12" Rocks)
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.