LANDEN Aquarium Congo Sand CS009-L-2LLANDEN Congo Sand is a mix of red and black sand with a deep and rich visual effect. It is suitable for general aquarium substrate sand or aquatic plant layout makeup sand. Its unique hue is ideal for mimicking a tropical rainforest environment. It can perfectly match bright aquatic green biophytes and woody elements such as roots and branches to create a natural and wild aesthetic for your aquarium. In addition, its color contrast significantly enhances the overall visual effect of the aquarium, making aquatic plants and fish colors more eye-catching. With particle sizes ranging from 0.4mm to 0.9mm, this mixed-size sand helps maintain clean water and ensures oxygen flow in the water, making it suitable for all types of aquatic life.