Calcium and magnesium as well as many other important trace nutrients are not only good for shrimps but also for all the other tank inhabitants as well as the water plants. For re-mineralising RO water or desalinated water, mineral salts are used that add exactly those minerals in the right amounts that are needed in order to raise carbonate and total hardness to the requirements of the animals that live in your aquarium.
Minerals are not only important for the animals in the tank but also provide the plants with everything they need to grow well. Thus it makes a lot of sense to add a small dose of these mineral salts every time you change a part of the water. Thus many useful elements can be supplied by adding a pinch of a mineral salt ? a simple way to further an overall more vital growth of your aquatic plants.
Be it shrimps, discus fish or other aquarium animals ? many of them need special water parameters. Mineral salts can specifically adjust the water conditions to their requirements and thus help the aquarium hobbyist to successfully keep these animals.