In the video, a person is seen working on a fish tank. The person is using a tool to adjust the water level in the tank. The tank is filled with water and has several fish swimming around. The person is carefully adjusting the water level to ensure that the fish are comfortable and healthy. The fish tank appears to be well-maintained, with clear water and a variety of fish species. The person's movements are precise and deliberate, indicating their expertise in handling fish tanks. Overall, the video showcases the importance of proper water management in maintaining a healthy aquatic environment for fish.