The video shows a person cleaning a fish tank. The person is using a net to remove dirt and debris from the water. The fish in the tank are swimming around, and the person is carefully removing the dirt without harming the fish. The tank is well-lit, and the water is clear, indicating that the tank is well-maintained. The person's movements are slow and precise, ensuring that the fish are not harmed during the cleaning process. Overall, the video shows a responsible approach to maintaining a healthy fish tank.