[cassianoleal]

I live in a hard water area as well.

I researched about this, and the best solution is to get a water softener. These are devices that mix salts with the water that break down the limescale minerals.

That said, most reputable manufacturers and installers of these devices will recommend you have an unsoftened tap for drinking water. The minerals in the water are actually good for you, and removing them could have deleterious effects on your health. Watering plants is generally best done with unsoftened water as well.