SunGrow Mineral Rocks - Provide Magnesium that enhances Shrimp's Color - Calcium helps molting - Absorb Toxic Chemical in Water - For Shrimps, Crayfish & Snails MINERALS BOOST HEALTH - Are your shrimps losing color? Do they not look as healthy as before? Here is your solution- SunGrow Mineral Rocks. Mineral rocks provide the perfect nutrient balance for vitality, color and health, especially for baby shrimps in growing age. They are rich in Calcium that helps shrimp with building stronger shell, and full of Magnesium that is essential for all crustaceans to maintain health and vibrancy. A natural mineral that can only be harvested and not made. CALCIUM HELPS MOLTING - Shrimps add vibrancy to your aquatic life and make great pets for both adults and kids alike. And these naturally occurring mineral rocks promote shrimp's longevity. Japanese shrimp breeders have a firm belief in these mineral stones and they use it in their breeding facilities. You too can beautify your aquarium with these color and age enhancing mineral rich rocks by SunGrow. A must- have for shrimps, especially Crystal red shrimps, Amano shrimps and Ghost shrimps. REMOVE TOXIC CHEMICALS - The mineral stones from SunGrow act as a natural ion exchanger that cleans water in the Aquarium. They enrich water with necessary minerals that enable shrimps to live longer. It even stores toxic substances like heavy metals and ammonium for a longer duration. NATURAL DECORATIVES - The applications of these mineral rocks by SunGrow don't just stop here! You can even make use of them in home furnishing by placing them in all the corners of a square or rectangular mirror. Else, place these on the centre table of your living room in a bowl filled with water along with a few coloured pebbles, marimos and other plants. VALUE FOR MONEY - Every pack contains 60 gm mineral rocks (0.5 inch on an average) surrounded by mineral powder. One pack is enough for a 14 gallon tank and lasts 3 months. So it's not at all heavy on your pocket. They are small and take very little space. So they are great for your nano tanks too!