ADA Aqua Soil Amazonia (3 Liter/Approx 7 Lbs) Normal Type Completely new substrate made from rare and sparse source of Japanese plant-based black soil derived from decomposed leaf mulch. (unlike imitation products that are made from volcanic ash-based black soil). Rich in organic elements and nutrients that creates conditions ideal for healthy growth of aquatic plants and has a good influence on the physiological functions of fish and shrimp. Helps to bring the pH level and hardness of the water down to an ideal level for most of the aquatic plants. Composed of granules of size and density ideal for the fast development of healthy plant root systems. Granules have a natural irregular shape that produces a natural look. Contains high levels of natural humic acid that may or may not cause some initial water cloudiness depending on your local water chemistry. Water cloudiness will go away with proper maintenance and water changes. Therefore, this product is recommended for advanced hobbyist seeking to make a fully planted aquarium. For beginners, we recommend the easier to handle Aqua soil Amazonia Light.