In no time, you'll have crystal clear water in your aquarium. Tetra CrystalWater quickly, safely, and reliably clarifies aquarium water by removing dirt particles that cloud it. Selected minerals gently eliminate all types of cloudiness. With its gentle action, it is completely safe for aquarium inhabitants and rapidly ensures crystal clear water. The effectiveness of the product is visible through a white cloud of active ingredients, which is harmless and disappears after a few hours. The active ingredients in Tetra CrystalWater bind small particles in the water into larger ones, which can then be filtered out through the aquarium filter. For optimal results, the filter should be cleaned regularly. Initial effects are visible after 2 to 3 hours, and crystal clear water is achieved within 6 to 12 hours.