18" CaribSea Life Rock Arch

This 18" CaribSea Life Rock Arch features an aragonitic base with millions of micro and macro pores that support beneficial bacteria colonization. The arch design creates instant reef structure and visual depth in large aquariums while remaining completely safe for fish, corals, and invertebrates. Made from sustainable materials rather than cement, it mimics natural rock with a coralline algae-like coating that develops authentic patina over time. An excellent choice for reef aquarists prioritizing both performance and environmental responsibility.