Product details:

Fluval Zeo-Carb is a premium blend of Fluval Carbon and Fluval Ammonia Remover. Working together, these highly effective media eliminate liquefied impurities, odors and discoloration, while simultaneously removing toxic ammonia, for a clean, healthy aquarium. Combining two products into one allows for more space within the filter for other types of media. For freshwater use only. Suitable for all Fluval External filters.