Features: brand new and high quality 1. Water Purification: The algaecide eliminates excessive moss and algae, making the pond water clear. 2. Reduce and Control Algae: The algaecide decomposes dead algae and digests leaves, grass clippings and rocks, to making water in pond clean and transparent. 3. High Efficiency: The algaecide is made of safe and harmless compounds and will not cause any harm to the fish ecosystem. 4. Easy to Apply: No need to manually remove dirt, quickly and efficiently eliminate harmful moss, and control the growth of algae in water. 5. Good for Fish: This algae repellent powder can significantly improve the for health and lifespan of your favorite fish. 6. How to use: Use 2g of algaecide in 100 liters of water (for removing algae), 1g of algaecide in 100 liters of water (for prevention). Apply once every other day, use 2-3 times in a row. Change 1/4 water before each use. Specifications: Material: Algaecide Color: As Pictures Show Size: Bottle Size Approx.4x8.5cm/1.57x3.35in Weight: Approx.50g Package Includes: 1 Bottle of Algaecide note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!