CaribSea Florida Crushed Coral — Aragonite Substrate (40 lbs)

CaribSea Florida Crushed Coral is a classic coarse-grain aragonite substrate made from natural coral material. Its large particle size makes it ideal for high-flow applications, sump beds, and deep sand bed denitrification setups where water flow through the substrate matters. As aragonite, it buffers pH naturally over time.

Key Features

• Natural aragonite — provides pH buffering as it slowly dissolves
• Coarse grain — ideal for high-flow environments and sump applications
• Excellent for deep sand bed (DSB) denitrification systems
• Free of impurities: no ash, metals, pesticides, or silica
• Classic marine substrate material trusted for decades

Size: 40 lbs (dry)