Torpedo Beach Sand - silver-toned freshwater sand.Caribsea's pre-washed Super Naturals are designed with your success and ease of use in mind. Packaged in sizes that make sense, most types are available in 20 pound bags. We have carefully selected different sizes and colors for you, to help you create a natural underwater environment. These inert products will not affect your pH or alkalinity, allowing you to adjust both of these important water quality parameters any way you wish. While these can be used for marine aquariums, keep in mind you will have to use standard buffers, such as our aragaMilk or aragaMight, to keep your alkalinity and pH up where they need to be.Torpedo Beach - An inert, natural substrate.á Recommended for freshwater aquariums with external filtration, and planted aquariums á Excellent for tanks with freshwater stingrays or catfishNobody puts as much effort into bringing you the quality and selection of aragonite products as CaribSea does. All of our substrates are scientifically sound and proven products. Aragonite, purposely engineered and free of impurities such as ash, metals, pesticides, and silica, allows you to create a safe and beautiful environment for your fish and invertebrates. Why take chances with other brands?Why should you choose CaribSea Products?At CaribSea, we take aquariums seriously. Since 1972, we have supplied hundreds of public aquariums, aquaculture facilities, and hundreds of thousands of dedicated aquarists with millions of pounds of the highest quality marine and freshwater substrates. CaribSea has been in the forefront of the principle of substrate as equipment, not just a decoration. CaribSea substrates are as precisely engineered as any piece of advanced equipment used by today's hobbyists and professionals. CaribSea products are the chemical support, and biological filtation backbone, for many of the most spectacular marine and freshwater displays ever created. After over 30 years in the industry, our product line has expanded to include a wide range of unique products for reptiles, arachnids, ponds, freshwater, and marine aquariums including a line of truly revolutionary additives. CaribSea is your aragonite source and so much more.