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CaribSea Aragonite Substrates are high-purity, marine-extracted calcium carbonate beds engineered to serve as a structurally stable, chemically active substrate for marine reef aquariums and high-pH freshwater systems. Unlike typical silicate-based play sands or industrial gravels, pure aragonite naturally dissolves over time when water parameters dip, systematically releasing calcium, carbonate alkalinity, magnesium, and strontium to buffer your system.
Core Technical Specifications
Chemical Profile: Composed entirely of natural marine aragonite, completely free of harmful ash, heavy metals, pesticides, and silica.
Bulk Material Density: Averages approximately 85 to 90 pounds per cubic foot depending on the specific grain mix.
Natural pH Buffering Target: Automatically dissolves slightly if parameters drop, forcing the water column to lock into a stable plateau between 7.8 and 8.2 for African Cichlids, or 8.1 and 8.4 for marine reefs.
Packaging Availability: Frequently supplied in standard 15-pound and 40-pound dry bags, as well as pre-wetted live versions
CaribSea Aragonite Substrates are high-purity, marine-extracted calcium carbonate beds engineered to serve as a structurally stable, chemically active substrate for marine reef aquariums and high-pH freshwater systems. Unlike typical silicate-based play sands or industrial gravels, pure aragonite naturally dissolves over time when water parameters dip, systematically releasing calcium, carbonate alkalinity, magnesium, and strontium to buffer your system.
Core Technical Specifications
Chemical Profile: Composed entirely of natural marine aragonite, completely free of harmful ash, heavy metals, pesticides, and silica.
Bulk Material Density: Averages approximately 85 to 90 pounds per cubic foot depending on the specific grain mix.
Natural pH Buffering Target: Automatically dissolves slightly if parameters drop, forcing the water column to lock into a stable plateau between 7.8 and 8.2 for African Cichlids, or 8.1 and 8.4 for marine reefs.
Packaging Availability: Frequently supplied in standard 15-pound and 40-pound dry bags, as well as pre-wetted live versions