Hard Water vs Soft Water: How Water Quality Affects Your Curls

Hard Water vs Soft Water: How Water Quality Affects Your Curls

  • By Shireen Moloney
  • May 20, 2025
  • 3 min read

Have you ever gone on holiday and found your hair reacts completely differently compared to washing your hair at home? Did you know that the quality of the water can affect your curls, either causing your hair to feel dry and frizzy, or creating soft, limp curls with no hold. In this blog post, we'll take a look at the difference between hard water and soft water, and how you can help your curls.

How Water Quality Affects Your Curls

You’ve likely heard of soft water and hard water, but what does this actually mean? The difference is in the level of minerals like calcium and magnesium.

What is soft water?

Soft water has low levels of calcium and magnesium. Shampoos tend to foam up easier with soft water and it has less impact on our hair, since the water doesn’t leave any residue. However, for those with fine curls, soft water can lead to the curls being overly soft and limp, with little hold. Fine, soft hair needs a little grit and texture to hold the curls which is when hard water can be helpful.

What is hard water?

Hard water has higher levels of calcium and magnesium, and this can build up on the hair over time. Shampoos tend to not lather as well, and have to work harder to clean the hair. It’s good to do a clarifying wash about once a month to remove hard water build up. Hard water can cause the hair to feel dry and frizzy, as well as feeling like there’s residue on the hair. It can also dry out scalps, leaving them feeling itchy and flaky, which can be an issue for those with sensitive skin.

What You Can Do To Help Your Curls

How to care for your curls with soft water

If you live in an area with soft water and you find your curls fall flat quickly or feel too soft, try adding protein to your routine. Protein strengthens the curls and adds bounce, as well as adding texture so your curls hold better. 

An easy way of adding protein to your curl routine is by using our Curl Mousse or Heat Protect Spray. These products are both rich in protein and work really well with our other styling products. Try adding some Mousse after the Hydrating Creme but before the Gel to create long-lasting bouncy curls. The Heat Protect Spray can be used at any point in your styling routine.

How to care for your curls with hard water

If your curls are struggling with hard water buildup, they might feel dry, frizzy, dull, or easily weighed down. Hard water contains high levels of minerals like calcium and magnesium that can cling to the hair shaft, blocking moisture from getting in and making it harder for your curly hair products to work their magic.

To tackle this and hit the reset button on your wash day, we highly recommend incorporating a detox shampoo into your routine. Our Curl Detox Clarifying Shampoo is specifically designed to deeply cleanse the scalp and gently remove hard water buildup, product residue, and impurities without stripping your curls of their essential moisture.

You might need a bit more moisture in your hair to counteract the drying effects of hard water, so regular deep conditioning with our Deep Hydration Hair Mask is helpful. 

The Power of Apple Cider Vinegar

If you’ve heard about the benefits of an Apple Cider Vinegar (ACV) rinse for hard water, you’ll love that our Detox Shampoo is already infused with it! Apple Cider Vinegar is a hero ingredient for curly hair because it naturally breaks down stubborn mineral deposits, restores the scalp's natural pH balance, and adds incredible shine.

Blended with refreshing fruit extracts alongside nourishing avocado and kukui oils, this clarifying shampoo for curly hair gives you all the purifying benefits of ACV while keeping your hair feeling lightweight, soft, and bouncy.

Styling Tips for Long-lasting Curls

  • When styling your hair, try to use products sparingly, especially if your hair is easily weighed down.
  • Always apply the Hydrating Creme on soaking wet hair as this will help lock in moisture.
  • If your hair is more frizzy, try our stronger Mega Hold Gel to combat this, and apply our Shine & Define Serum on dry hair to seal your curls and smooth any remaining frizz. 

Do you find your hair is affected by the water you have at home or when you go on holiday? Try our helpful tips on your next wash day and see the difference it makes to your curls!

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