In the video, a person is seen cleaning a fish tank. The person is holding a green box and is using it to clean the bottom of the tank. The fish tank is filled with water, and there are several fish swimming around. The person is using the green box to scoop up the dirt and debris from the bottom of the tank. The fish are swimming around the tank, and the person is carefully cleaning the tank without disturbing the fish too much. The fish tank is well-lit, and the water is clear. The person is wearing a white shirt and appears to be focused on cleaning the tank. The green box is being used to collect the dirt and debris, and the person is using a small brush to clean the bottom of the tank. The fish are swimming around calmly, and the person is taking care to not harm them while cleaning the tank.