landen aqua soil substrate for natural planted aquarium, plant or shrimp stratum, clay gravel and stable porous substrate for freshwater aquarium, black color 10lbs landen landen aqua soil is developed for cultivation of aquatics plants and is also suitable substrate for shrimps. it provides fundamental minerals and trace elements, which promote the health and growth of shrimps. it is made from specially processed natural material from the earth. aqua soil helps lower the hardiness and ph level of water. it is ideal substrate for most aquatic plants and it provides healthy plant root system. soil does not require rinsing and can be used directly in aquarium. 【note】suggest to wait for at least a week until your filtering system is stable for the cycling if you want to move in any fish or shrimp.