Fluval Zeo-Carb is a premium blend of research grade Fluval Carbon and Fluval Ammonia Remover. Working together, these highly effective media types eliminate liquified impurities, odours and discolouration, 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. Fluval Carbon filters out harmful liquid substances from the water, such as heavy metals, odours, discolorations, pollutants and toxins. It is worth noting that the carbon will also strip out most fish medications and treatments so you should remove the carbon if you need to treat the fish for any illness. Fluval Ammonia Remover is designed to neutralise toxic ammonia, a common issue for new, heavily stocked and overfed aquariums. A great option to add when adding the first few fish to a new aquarium.