CaribSea LifeRock Arch 12 Inch 4Pk – Reef Arch Aquascaping Rock

Create breathtaking reef structures with CaribSea LifeRock Arch 12 Inch 4Pk, a premium aquascaping solution designed to deliver dramatic visuals with outstanding biological performance. Each arch measures approximately 12 inches long and features open, three-dimensional shapes that provide natural swim-throughs, shelters, and shelf areas for fish, corals, and invertebrates.

Crafted from real aragonitic base rock—not cement—LifeRock arches offer extensive macro and micro porosity infused with living, spored bacteria to support efficient biological filtration and reduce cycling time. Their open and lightweight design fills the aquarium beautifully while maintaining excellent water flow and circulation. Finished in highly realistic reef coloration, every piece is unique, pest-free, and ready to use with no curing required, delivering the look of a mature, established reef from day one.

Key Features

• Real aragonitic reef rock with natural arch formations
• Approximately 12″ long arches for dramatic aquascaping
• Extensive macro and micro porosity for biological filtration
• Infused with living, spored bacteria for faster cycling
• Open 3D shapes create swim-throughs and coral platforms
• Maintains strong water flow and circulation
• Pest-free, reef-safe, and ready to use with no curing needed

CaribSea LifeRock Arch 12 Inch 4Pk is the perfect choice for aquarists looking to build visually stunning, high-flow reef aquascapes. With natural shapes, instant biological benefits, and unmatched realism, it offers both beauty and performance for marine and reef aquariums.