Arches Extra Large 18″ (2 PC BOX)
A 30-pound box of 2 Real Reef Extra Large Arches (~18 inches)—reef-safe, bio-active, and perfect for dramatic, natural overhangs and swim-throughs in marine and hard freshwater aquariums.
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Description
Real Reef Extra Large Arches – 30 lb Box (2 pieces, ~18 inches)
Real Reef Extra Large Arches offer bold, reef-safe calcium-based structures designed to create dramatic focal points in your aquascape. This 30-pound box contains 2 pre-cured arches, each approximately 18 inches long, showcasing vibrant pink, purple, and red hues that replicate the look of mature coralline-encrusted rock.
Ideal for building striking overhangs, large swim-throughs, caves, and elevated coral platforms, these lightweight and porous arches support biological filtration while enhancing water flow and fish behavior. Their size and form provide a commanding presence and functional framework for marine reef and fish-only saltwater aquariums.
Also suitable for hard freshwater tanks where higher pH is tolerated, Real Reef Extra Large Arches are sustainable, pest-free, and easy to work with—perfect as show-stopping centerpieces or structural supports in your reef setup.
Additional information
| Brand | Real Reef Solutions |
|---|---|
| Size | 25 lb Box (Assorted Sizes), 50 lb Box (Assorted Sizes) |





















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