Ideal for freshwater aquarium plant care. Its porous structure stimulates root growth. Suitable for burrowing fish. High iron content nutrient reserve. Capable of absorbing excess nutrients and releasing them when needed. The high iron content can be absorbed by plant roots. Activates the soil flora by promoting efficient and rapid colonization by beneficial soil bacteria. The growth of undesirable algae is thus slowed down, the filter is relieved and the water becomes clear and limpid. The dark brown coloring of the fish emphasizes the colorfulness of the fish and, together with the green and red tones of the plants, forms a harmonious whole. Ready-to-use soil substrate.