In this video, we see a person's hand holding a sponge and cleaning the glass of an aquarium. The aquarium is filled with water, and there are several fish swimming around. The person is using the sponge to clean the glass, and we can see the water being disturbed as they move the sponge across the surface. The fish in the aquarium are of different sizes and colors, and they swim around the tank, occasionally coming up to the glass to look at the person cleaning it. The aquarium appears to be well-maintained, with clear water and healthy-looking fish. Overall, the video shows a person taking care of their aquarium and ensuring that the fish are in a clean and safe environment.