HabiStat Amazon Sinking Clay Ball Filtration substrate has been designed to be used with HabiStat Jungle Bio.Working together, these two substrates create a natural filtration system for your bio-active set up. Unlike other similar products available, these clay balls sink which allows the substrate to be moistened from underneath. This also enables the substrate to be used in an aquatic environment. Long-lasting, this substrate is easy to clean. Extremely porous, it can be used in biological filters for cleaning fish and turtle tanks. Our range of HabiStat substrates are packed in 100% recyclable and biodegradable paper bags.Available in a 10L bag. Directions for Use: Wash thoroughly before use under running water until the water becomes clear. Pour into a glass based terrarium to create the base layer for your bio active set up.