Terragran combines the beneficial properties of plant nutrient soil, biofilter material and decorative substrate in one product. Terragran is rich in minerals and trace elements. The roots of the aquatic plants gradually release the nutrients bound in the clay as needed, thus maintaining an ideal supply of nutrients over a long period of time. The high iron content gives the substrate its natural reddish coloration, which also enhances the color brilliance of fish and plants in the aquarium. The porous structure of the active substrate provides an optimal surface for bacteria colonization.
