From industry firsts to industry standards, Marineland products are designed with both performance and style in mind. We push precision and power beyond the expected and listen to our loyal customers to make our products even better. We do this because at the heart of our innovative spirit is a desire to help hobbyists everywhere do more, create more and, most of all, enjoy more. So whatever your customers are passionate about — freshwater or saltwater, big or small, beauty or science — help them make their aquarium their own. Make it Marineland. Marineland Black Diamond Media Premium Activated Carbon removes more discoloration, odors and impurities compared to our next leading competitor according to a 2015 University study. Use this premium activated carbon for sparkling clean water that helps create the aquarium of your dreams. Marineland Black Diamond Media Premium Activated Carbon is ideal for all aquarium filters and is specifically sized to be more efficient.