aquavitro premium surgical stainless steel Double Curved Shears are designed for use in both freshwater and marine aquariums.These are ideal for the regular maintenance of aquatic plants,particularly when trimming leaves and stems closer to the aquarium bed where the steep angle is mitigated by the double curve of the shears. These are especially well suited for trimming ground cover which can be very difficult with traditional shears. They are also extremely effective at trimming in hard to reach places such as beneath and behind driftwood and rocks.