2 - 5.5mm

So many choices try them all! More than just aragonite!

CaribSea's dry marine substrates are recognized worldwide for their purity and precision. Our substrates are purposely engineered and free of impurities such as ash, metals, pesticides, and silica; which allows you to create a safe and beautiful environment for your fish and invertebrates. Precision grading makes system design a breeze! No matter what type of system you are setting up, we have the substrate that's perfect for the filtration method and habitat you are creating.

• Dry crushed coral and aragonite substrate for marine aquariums
• Functional marine substrate buffers aquariums from pH swings
• Free of impurities such as ash, metals, pesticides, and silica for safe aquarium set up