In a video taken aboard the International Space Station (ISS), astronaut Scott Kelly can be seen extracting a floating ball of water from a tank. He then adds a few drops of food dye to the water, turning it green. Finally, he drops an effervescent tablet into the water, causing the ball to bubble and fizz as the tablet dissolves. The gas bubbles cause the water to deform and move around, creating an amazing visual effect.

Link to the 4K video: https://www.youtube.com/watch?v=bKk_7NIKY3Y