Purple Life Rock - Arches - 20Lbs Box - CaribSea

CaribSea’s LifeRock Arches offer a visually striking and functionally smart way to build natural-looking reef structures in your saltwater aquarium. Each piece is shaped to mimic the elegant arches found in mature reefs, creating ideal swim-throughs, caves, and hiding spots for fish and inverts. These arches are not only beautiful—they’re biologically functional and reef-safe right out of the box.

Key Features:

- Includes only arch-shaped LifeRock pieces
- Instantly creates a mature reef look with natural curves and open spaces
- 100% safe for all marine fish, invertebrates, and corals
- Infused with spored bacteria to support biological filtration
- No curing required – ready to use
- Made from real aragonitic base rock, not cement
- Highly porous with micro and macro pathways for nitrifying bacteria
- Environmentally responsible – manmade, not harvested from reefs
- Coated to resemble coralline algae, blending seamlessly over time

Each LifeRock Arch is hand-shaped and coated to resemble live rock that’s been in the ocean for years. The realistic purple coating mimics mature coralline algae and is completely reef-safe—even if picked at by livestock. Over time, live coralline algae will naturally grow, covering and blending with the rock surface.

These arches are ideal for aquascapers looking to create open, dynamic reef structures with excellent water flow and viewing angles.

What’s Included:

20 lbs of LifeRock Arches (Approximately 4 arch-shaped pieces per box)

Recommendation:

Use ~1 lb of rock per gallon of tank volume. Extra rock can be used in sumps, refugiums, or broken into rubble for additional filtration support.

Rock is naturally fragile and some breakage may occur during shipping. While we inspect and securely pack each box, carrier handling is beyond our control. Shipping insurance does not cover breakage, so we cannot offer replacements.