Desgined for planted aquariums and aquascaping, Controsand by Ultum Nature Systems is a natural substrate blended for freshwater aquariums and terrariums, Controsand is safe for fish/invertabrates/reptiles. Controsands can be used alone or in combonation, layered to create different scapes. Bora is a white fine natural sand containing a mixture of lighter tones that is perfect for highlighting vibrant aquatic plants, tropical livestock and darker layout materials. Bora is ideal for a wide variety of popular aquascaping styles.