At Marineland, innovation powers everything we do. 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. Make it Marineland. Marineland Diamond Blend Media Ammonia Neutralizing Zeolite Blend removes toxic ammonia and impurities for sparkling, fish safe water. This product is ideal for all freshwater aquariums and ponds. This product is specifically formulated with Clinoptilolite Zeolite and Black Diamond Premium Activated Carbon. The Black Diamond Premium Activated Carbon is heat-activated, bituminous coal-based carbon. This product comes in multiple sizes to fit your personal aquatic needs! Marineland Diamond Blend Media Ammonia Neutralizing Zeolite Blend is harmful if inhaled and an eye irritant.