The 5 pound bag of Aqueon Plant & Shrimp Aquarium Substrate is well suited for aquariums with shrimp and freshwater plants. The clay based material is constructed with a spherical shape that both maintains its form and will not degrade into compressed soil. The shape of the clay balls provide an exceptional environment for root systems to grow and thrive, as well as offering plenty of space between the substrate for shrimp to pick out various food particles or detritus. Safe for all tank inhabitants.