Eczema flare-ups have a few common triggers. In Australian homes, hard water and chlorine are two of the main ones. A shower filter reduces both. It will not treat eczema, but it can make showers less irritating for sensitive skin.
Why shower water matters for eczema
Eczema weakens the skin barrier. Moisture escapes more easily, and irritants get in more easily. That means every shower can leave skin worse off.
Two parts of Australian tap water make this worse.
Chlorine. Water authorities add chlorine to kill bacteria. It does that job well. But it also strips natural oils from skin. On healthy skin, that feels drying. On eczema-prone skin, it can set off a flare.
Hard water minerals. In cities like Perth and Adelaide, tap water contains high levels of calcium and magnesium. Those minerals can stay on skin after rinsing. They do not wash away cleanly. They can leave the barrier feeling rough and make moisturisers work less well. Check our guide to hard water areas in Australia to see how hard your local water is.
Read our article on hard water effects on skin for more detail.
Does hard water make eczema worse?
Hard water can make eczema harder to manage. UK studies that followed thousands of children found higher eczema rates in hard water areas. Research also links chlorine in bathing water with drier skin and more flare-ups. Both minerals and chlorine can disturb the skin barrier. (British Journal of Dermatology, 2020)
Hard water does not cause eczema. It can make existing eczema harder to live with. If your flare-ups got worse after you moved, your water may be part of the reason.
What does a shower filter do?
A shower filter sits between your shower arm and showerhead. It filters the water before it reaches your skin.
The POWERBOX™ shower filter uses KDF-55 media and calcium sulfite. These help reduce chlorine in shower water. For eczema-prone skin, that lower chlorine exposure is the main benefit.
A shower filter is not a water softener. It does not fully remove calcium and magnesium. No shower-mounted device does that. It does remove chlorine, reduce some heavy metals, and filter sediment. That means fewer irritants on your skin each day.
What can a shower filter not do?
Be clear about this before you buy:
- It will not cure eczema
- It will not replace your emollient routine
- It will not fully soften hard water
- It is not a substitute for a dermatologist’s advice
A shower filter is one tool for managing your environment. It reduces irritants. It does not treat a skin condition.
Who is this most likely to help?
A shower filter works best if:
- You live in a hard water city (Perth, Adelaide, parts of regional Australia)
- Your water is heavily chlorinated
- Your eczema flare-ups are linked to bathing, not food or stress
- Your skin feels worse right after showering
Children with eczema often have a weaker skin barrier than adults. Parents in hard water areas often report fewer flare-ups after switching to filtered shower water. For more on eczema triggers, see the Eczema Association of Australasia.
Which shower filter to use
The POWERBOX™ shower filter for hard water comes with two cartridges. Each cartridge lasts 2 to 6 months, depending on water hardness and how often you use it.
It fits standard Australian shower setups. The thread is 1/2-inch, so it works with wall-mounted, handheld, rain, and combo shower types. Installation takes about 5 minutes and does not need tools. See our guide on how to install a shower filter for step-by-step help.
Tips for showering with eczema
These help alongside a filter, not instead of one:
- Keep showers under 10 minutes
- Use lukewarm water, not hot. Hot water strips skin oils.
- Pat skin dry gently. Do not rub.
- Apply emollient within 3 minutes of getting out. This helps lock in moisture.
- Use fragrance-free, soap-free wash products.
The shower is only one part of eczema care. A full routine matters too.
Disclaimer: A shower filter is not a medical treatment for eczema or any skin condition. If you have a diagnosed skin condition, speak with a dermatologist before changing your bathing routine.
Frequently asked questions
Can a shower filter help with eczema?
A shower filter removes chlorine from shower water. Chlorine is a known irritant that can worsen eczema flare-ups. Reducing chlorine may make showering less irritating for eczema-prone skin. It is not a medical treatment.
Does hard water make eczema worse?
Hard water can worsen eczema. Calcium and magnesium in hard water block the skin barrier and reduce how well moisturisers absorb. Research links hard water to higher eczema rates in children.
What shower filter is best for eczema in Australia?
Look for a filter that removes chlorine. The POWERBOX filter uses KDF-55 and calcium sulfite media. Both are effective at chlorine reduction.
Is a shower filter a treatment for eczema?
No. A shower filter reduces irritants in shower water. It is not a medical treatment. See a dermatologist for eczema diagnosis and treatment.
Does chlorine in tap water trigger eczema?
Chlorine can trigger or worsen eczema. It strips natural skin oils and irritates a compromised skin barrier. A shower filter can reduce chlorine exposure.