Charlie's Soap Laundry Booster for Hard Water

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Charlie’s Soap Biodegradable Booster & Hard Water Treatment boosts your laundry detergent’s cleaning ability to give your laundry a deeper clean by controlling hard water and removing the build-up it leaves behind on your clothes and in your washing machine.

Hard water minerals like calcium and magnesium leave a residue on your clothes, making fabrics look dull and feel rough to the touch. It can also cause “scale” (also known as “limescale”) or mineral buildup in pipes and plumbing fixtures, reducing the effectiveness of both your laundry detergent and your washer.

Charlie’s Soap Booster & Hard Water Treatment is a biodegradable phosphate that eliminates problems associated with hard water and aids with natural biodegradation of compounds in nature. By controlling hard water conditions, our Booster lets you get the bright, clean, softer, odor-free laundry you love, without the damaging residue.

Charlie’s Soap Natural Booster & Hard Water Treatment Features

  • Fragrance-free
  • Works in both traditional top-loading washers and HE machines
  • Powerfully removes the effects of hard water, but is still gentle on sensitive skin
  • Safe for all septic systems
  • Effective in hot water and cold water cycles

Charlie’s Soap Natural Booster & Hard Water Treatment Benefits

  • Enjoy clothes longer. The effects of hard water residues can weaken your fabrics’ fibers, shortening their lifespan. Our Booster & Hard Water Treatment cleans your clothes without the mineral buildup, meaning you can enjoy them longer. 
  • Environmentally friendly. Our biodegradable booster is made from an environmentally safe phosphate that softens water and leaves no hard water scale.
  • Sensitive skin friendly. Rinses completely from fabric, leaving behind no additives or residue on your clothes that can irritate sensitive skin. One of our most popular uses is for cloth diapers.
  • Save Money. Skip the expensive water softening system, but still gain softer clothes with an affordable, all-natural laundry soap. Both your washer and your skin will thank you.  Our 2.64 lbs bag can treat up to 160 loads of laundry.  Compare that to other water softeners that only treat a few loads.

How to Use Charlie’s Soap Natural Booster & Hard Water Treatment

If you have hard water issues, use at least ½ tbsp of Charlie’s Soap Natural Booster & Hard Water Treatment per wash, pouring directly into the drum. Use 1 full tbsp for tough stains or excessively hard water. Works most effectively when combined with the cleaning power of our Natural Liquid Laundry Detergent or our Natural Powder Detergent. We recommend using hot water during your cycle, so that the water temperatureallows the products to fully dissolve and work their magic.

It can take several wash cycles to remove the initial hard water build up in your clothes, but after just a few laundry days, you’ll see your laundry detergent work harder with noticeably brighter, softer, and exceptionally clean clothes, without the need for bleach, brighteners, or fabric softeners.

This hard water treatment product is eco-friendly and safe to use in all washing machines, including traditional, top loaders and high-efficiencyfront loading washing machines.

The Charlie’s Soap Difference

All of Charlie’s Soap laundry products are scientifically formulated to give you a deep clean with minimal impact on your appliances, health, skin, and the environment. All of our cleaning products are biodegradable, dye-free, hypoallergenic, and perfume-free

We believe that you shouldn’t have to sacrifice deep clean when you live green. For over 40 years, we’ve offered the best laundry detergents, stain removers, and water treatments, so households can enjoy cleaner, brighter laundry that’s gentle on the skin, all while extending the lifespan of fabrics and appliances. We’re proud to do our part in lengthening product and clothing life cycles, helping to keep them out of landfills. 

Ingredients in Charlie’s Soap Laundry Booster for Hard Water

Potassium diphosphate (7320-34-5) [water softener]

Ingredients You Won’t Find in Charlie’s Soap Products

  • Baking soda
  • Zeolites
  • Fragrances
  • Bleach
  • Anti-foaming agents
  • Essential oils
  • Thickening agents
  • Enzymes 
  • Dyes
  • Odor blockers
  • Preservatives

First Time User Tips

Use at least 1/2 tbsp. of Charlie’s Soap Booster as needed per wash.  Use 1 full tbsp. for tough stains or excessively hard water.  You may apply Booster directly to the drum.  Wash according to care instructions.  Test on garments that may bleed for fade.

Charlie’s Soap Booster and Hard Water Treatment uses a simple phosphate that:

  • Softens your wash water.
  • Allows Charlie’s Soap detergent to work better in the wash.
  • Rinses completely leaving no residue on your clothes.
  • Aids in natural biodegradation in the environment, when using 1 tbsp. per wash.
  • Keeps your clothes and the environment clean.



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