CaribSea Arag-Alive 20-Pound Special Grade Reef Sand Bahamas Oolite | Live Bacteria Substrate for Marine Aquariums

Bring the world’s most exotic reefs into your home with CaribSea Arag-Alive 20-Pound Special Grade Reef Sand, Bahamas oolite. This substrate is the result of collaboration with public aquariums and zoological parks, where authenticity matters as much as aesthetics. The aragonite base creates a natural-looking seabed while supporting a balanced marine environment from day one.

Arag-Alive goes beyond looks. It ships with millions of beneficial marine bacteria per pound, engineered to help reduce waste in closed systems and to support a stable water column. In practice, reef keepers report a smoother setup process and a more forgiving start for diverse invertebrates and fish, with pH tending toward stable conditions without constant chemical additions.

One of the key aims is to suppress new tank syndrome and accelerate the ammonia cycle. By introducing a populated microbial community, the substrate can begin to establish biological balance quickly, which independent labs have shown to cycle aquariums faster than some competing products. The Bahamas oolite color adds depth to the display, while the substrate shape contributes to natural flow in the tank.

Key benefits

• Functional and beautiful aragonite substrate for all types of marine aquariums
• Contains millions of beneficial marine bacteria to enhance biological filtration
• Many styles to help recreate any marine environment

In your reef tank

• Supports a natural pH balance with less need for constant chemical adjustments
• Enhances biological filtration for a cleaner water column
• Helps create a realistic seabed for diverse corals and inhabitants

Product specifics: This is a 20-pound bag of special grade aragonite reef sand designed for marine aquariums, available in Bahamas oolite tone. It is compatible with a variety of equipment and takes well to aquascaping. For best results, rinse lightly if desired, fill gradually to limit dust, and combine with a suitable filtration and lighting plan. Individual tank results vary with bioload and maintenance cadence, but Arag-Alive is crafted to support a healthy starting point for many setups.