AQUAEL Advanced Soil (Shrimp)Please allow 2 to 7 working days to deliver. Professional bottom substrate for freshwater shrimp aquariums, produced in Japan. In terms of appearance, the soil resembles black gravel, with an average grain diameter of 1 to 4 mm. Natural, carefully selected components bring relevant water values to the optimal level for shrimps and support an intact ecosystem an all round feel good package for the flora and fauna of your aquarium. The natural