I recently decided to go back to blonde from a dark brown. When I got my hair done, the stylist was having trouble because of the minerals in my hair from hard (well) water. After applying Malibu C Hard Water Wellness Remedy and then using the Hard Water Wellness Shampoo and Conditioner, he was able to get the blonde to come through without seriously damaging my hair. I'm using the shampoo and conditioner for daily use now!