The video shows a person using a siphon to clean the water in a fish tank. The siphon is made of clear plastic and has a curved shape. The person attaches the siphon to the side of the fish tank and then attaches a purple bucket to the other end. They then use a hand pump to suck the water out of the tank through the siphon and into the bucket. The fish tank is filled with green plants and small fish can be seen swimming around. The video is shot in a well-lit room and the person's hands are visible as they operate the siphon.