Compared , the living environment and food you provided for reptile pet may be not healthy enough, so that they are more likely to get sick. , you should add some mineral in daily feeding to guard their health. Features - ColorWhite - Material: Mineral substance - Size: 1.20X1.20X1.20cm/0.47X0.47X0.47in - You do not need to wash it, and it can be put in the fish tank directly to be used. - With rich trace elements, this calcium block has a longer life, and it is really economic. - The perfect size and shape for the tortoise to chew safely, no choking , can rest assured to use. - Dissolve in water for drinking, bath water and feeding water can also be dissolved in water for using turtle food. - Conveniently calcium mineral for your pet, allow them to and avoid sickness. Package list: 6 x turtle tank calcium cubes