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Substrate
Marine Substrates for saltwater aquarium setups. Choose from our selection of high quality marine substrates to create ideal conditions for your saltwater fish-only, saltwater fish-only-with-live-rock (FOWLR), coral reef aquarium or refugium. Aquarium gravel is both beautiful and functional when you use CaribS... Read more
Marine Substrates for saltwater aquarium setups. Choose from our selection of high quality marine substrates to create ideal conditions for your saltwater fish-only, saltwater fish-only-with-live-rock (FOWLR), coral reef aquarium or refugium.

Aquarium gravel is both beautiful and functional when you use CaribSea Instant Aquarium Freshwater Substrates. These attractive substrates are packed with water containing beneficial bacteria to condition and cycle new setups. Live water-purifying bacteria jumpstart the cycling process to minimize "New Tank Syndrome." Rich substrate coloration provides a gorgeous backdrop for tropical aquarium fish.

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