HabiStat Amazon Clay Ball Filteration Substrate can be used as a substrate with water. Banks and land areas can be made by simply moving it around.
It can be used under other substrates in naturalistic vivariums and provides a body of water and a bio filter.

It is very porous and can be used in biological filters. It is very easy to wash and lasts for many years.
Not to be confused with other similar substrates that float and cannot be used in most applications.