JBL Sansibar White 5 kgWhite, fine substrate for freshwater and saltwater aquariums. Key Features: Perfect hold for plant roots: substrate with 0. 2 0. 6mm grain size for freshwater and marine aquariums and terrariums. Vigorous plant growth: prevents the seeping in of sludge and other waste material with its fine granulation and density. Ideal for fish, invertebrates and plants: no unwanted pollutants released into the water. Fine, round shaped granite sand is gentle on