A preparation for conditioning of tap water intended for breeding shrimps and other freshwater crustaceans. Recommended when filling new homes or changing water. CRUSTA GUARD neutralizes dangerous salts of heavy metals and alleviates stress caused by acclimatization of fish in a new tank. Protective colloids protect crustaceans against aggressive influence of tap water. Inositol stimulates growth and enhances vitality, alleviates all ailments caused by the moulting process and encourages spawning. D-pantenol (provitamin B₅) regulates metabolism processes, coats the fish’s skin and accelerates its regeneration, which proves useful during moulting period.