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Tantora mineral stones are absorbent mineral stones made of montmorillonite. These mineral stones enrich the water with important minerals and act as a natural ion exchanger. Toxic substances such as ammonia/ammonium and heavy metals are stored over a longer period of time and therefore pose no threat to invertebrates such as shrimp, crayfish and fish.
Initially it will seem as if the stones dissolve in water, but in fact the stones first swell a little with water and then absorb the toxins in the intermediate layers of the stone. These tantora mineral stones release important minerals that contribute to good health and vitality of shrimp. The stones also help prevent problems caused by poor molting.
Japanese shrimp farmers have long been convinced of the positive properties of mineral stones and have been using the stones for shrimp farming for a long time.