Features: 1.Aquarium Algaecide: This cleaner reduces odor while balancing algae and micro-organisms. 2. Effective Purifier: Eliminates excessive moss, algae which turns your water cloudy and unsightly. 3. Improve fishes Life: Start cleaning and purification immediately, it only takes 3-5 hours to complete. Significantly improves the health and life-span of your beloved fishes. 4.Easy Cleaning: This is the most cost-effective, sustainable, safest way of maintaining the clean water into your ponds 5.No need to manually remove dirt: eliminate unwanted moss at high speed and efficiency and control algae growth in the water. How to use: Remove existing algae: 100L water: 2g reagent Preventions of algae: 100L water: 1g reagent After applying 2-3 times, please change the 1/4 water before use. includes: 1bottle x Aquarium Algaecide