Dragon Rocks are beautiful Rocks, that gives your aquarium a fabulous look. Ohko rocks mostly used for decoration purpose, Like in Gardens, Ponds and in Aquariums. Dragon Rocks comes in Brown Color. Ohko Dragon Rocks will not affect the Aquarium Water. They are solid rocks in mix sizes. 1. Available in 1lbs, 3lbs and 5lbs. 2. Good for Aquariums and Decoration. 3. Dragon Rocks does not affect the water quality. 4. Dragon Rocks are low weight Stones.