Arrow keys turn the cube. Space disturbs the water. Tap the mark or press D to make it nosedive through the Z depth. Tap the hourglass or seabed to grow the cactus. Keys 1 through 4 choose weight, optical size, softness, and wonk; plus and minus change the chosen axis. Double tap a visible glass wall or press P to start an escape. Tap the seabed or press B to release sediment. Press R to restore the wall, M to pause motion, S to open the color companion, and T to toggle rotation. Two-finger touch or G enables motion input on supported devices; tilt and shake then move the liquid. A tentative report describes the older tank as a 20 inch cube, about 35 US gallons or 131 liters of nominal outer volume. This 1 to 1 to 1 scene starts at 82 percent visual fill, about 107 liters on that scale. Glass and substrate would lower actual water volume. Its fluid samples are a visual simulation, not individual molecules.