Addicted2Fish premium surgical grade stainless steel Grooved Grip Curved Tweezers are designed to be used in both freshwater and marine aquariums.  These are ideal for planting and maintaining aquatic plants, particularly plants with thick or broad stems and in hard to reach places.  In marine systems, these tweezers are useful when placing or retrieving coral frags or colonies.   These are often a must have tool and widely used in all aspects of aquascaping of any aquarium.  To ensure longevity, please rinse the tools in freshwater and dry thoroughly after each use.