CaribSea Aragonite Florida Crushed Coral 2–5mm 40lb Bag

Solve chronic pH issues and enhance biological filtration with CaribSea Aragonite Florida Crushed Coral 2–5mm 40lb Bag, the only crushed coral substrate made entirely from true aragonite. Offering up to 25 times more buffering power than traditional crushed coral, dolomite, or oyster shell, this premium substrate helps maintain stable water chemistry while supporting a heavier bioload.

With a grain size of approximately 2–5mm (⅛–¼”), Florida Crushed Coral provides exceptional surface area for beneficial, water-purifying bacteria, allowing aquariums to support up to 50% higher bioload. Unlike many substrates, it does not require replacement, making it a long-lasting and cost-effective solution. In addition to aquarium use, it is ideal for calcium reactors and plenum systems, delivering calcium, carbonate buffer, and high concentrations of essential trace elements such as strontium.

Key Features

• True aragonite crushed coral for superior buffering
• Up to 25× more buffering power than standard crushed corals
• Helps eliminate chronic pH instability
• 2–5mm grain size for excellent biological filtration
• Supports increased aquarium bioload up to 50%
• Never needs replacement under normal use
• Suitable for calcium reactors and plenum systems
• Supplies calcium, carbonate, and trace elements including strontium

CaribSea Aragonite Florida Crushed Coral 2–5mm 40lb Bag is a high-performance substrate designed for aquarists who demand stable pH, strong biological filtration, and long-term reliability. Ideal for marine, reef, and specialized filtration systems, it delivers unmatched buffering strength and lasting value.