The video shows a close-up view of a fish tank with water bubbling up from the bottom. The tank is filled with water and has a glass wall. There is a thermometer attached to the glass wall, and the water is clear. The bubbles are small and numerous, indicating that the tank is well-aerated. The fish tank appears to be well-maintained, and the water is clean. The thermometer is black with a red bulb at the top, and it is attached to the glass wall with a black suction cup. The bubbles are continuously rising to the surface, creating a soothing sound.