The video shows a close-up view of a fish tank. The tank is filled with water and has a layer of green algae on the surface. There are several small blue lights scattered throughout the water, creating a calming effect. The tank appears to be well-maintained, with no visible debris or algae growth. The blue lights are the only source of illumination in the tank, and they cast a soft glow on the algae. The water is clear, and the algae are spread evenly across the surface. There are no fish or other aquatic creatures visible in the video.