If your hot tub shell and jets feel rough like sandpaper then you most likely have an issue with limescale in your water. If untreated and left unresolved for long periods, this can have a negative impact on components with pumps and heaters failing. But don't worry, in this article we will help you understand why this occurs, how to remove it from your hot tub and how to prevent scale from building up in your hot tub in the future.