South Seas RockSouth Seas Base Rock is a premium quality stone that features a light brown white tone formed by natural weathering processes, the erosion and pitting of limestone over the course of eons. It is clean and safe for marine, reef and hard water freshwater aquariums such as African cichlids. South Seas Base Rock can also be an interesting and realistic addition to a desert reptile biome. Note: As with any natural rock, pieces come in various shapes and