Azolla is a fantastic addition to fish ponds. Advantages 1. *Natural food source*: Azolla is rich in protein, making it an excellent feed supplement for fish. 2. *Water purification*: Azolla helps remove excess nutrients, such as nitrogen and phosphorus, from the water, maintaining a healthy environment for fish. 3. *Shade provision*: Azolla's dense mat provides shade, reducing water temperature and preventing excessive algae growth. 4. *Habitat creation*: Azolla creates a habitat for beneficial insects and microorganisms, which help maintain a balanced ecosystem. 5. *Reduced water evaporation*: Azolla's mat helps minimize water evaporation, conserving water and reducing the need for frequent water changes. The best way is to produce it from it's own pond. If you want it inbox for more.