Hydroton is a clay aggregate manufactured exclusively at high-temperature kilns in Germany and is best suited for growing larger plants, like tomatoes, peppers, and banana trees. It holds water extremely well and transmits it effectively to the plant roots. The pellets are uniform in size and have an attractive, natural appearance. Hydroton is a chemically inert medium with a neutral pH, and is reusable, clean and odorless. 50 liter bag.