What medicine can be used for waterline cleaning in farms to completely remove algae and moss?

Moss in fish ponds is the general name of several filamentous green algae such as Spirogyra. The growth of moss in fish ponds seriously affects the water quality of ponds, leading to the decrease of plankton, slow growth of fish and even the death of fish species. So there are several common methods to remove pond moss: 1. Plant ash Method: Choose sunny morning, and use 25-30 kg of plant ash (dry ash) per mu of water surface. 2. Blue alum elimination method: 2 kg ~ 3 kg of blue alum is used per mu, and 20 kg of water is added for cross-well spraying. Generally, moss can be eliminated in 5 days. However, the amount of blue alum should not be too much, resulting in unnecessary losses. 3. Application method of maple leaf juice: Use 30 kilograms of maple leaf per mu of water surface, add 50 kilograms of water to 100 kilograms, boil for half an hour, and sprinkle the cooked maple leaf juice all over the pool water. Generally, all the moss can be killed after 4 days. 4. Pinus massoniana leaf method: soak 20 kilograms of fresh Pinus massoniana leaves in each mu of fish pond, grind and add water to make 25 kilograms of pulp, and spread it all over the well once a day for 2-3 days. 5. Sulfuric acid elimination method: 0.7 g copper sulfate per cubic meter can be used to eliminate moss.