The Litmus Showerhead and the Oxidant Seal filter capsule What if your shower could do more: the benefits of filtering the water you rinse in Hair panel: brittle, damage-prone hair into smoother strands that shine Skin panel: calmer skin by addressing the chlorine in shower water Smiling under the full spray, the filter capsule visible above the head
The Litmus Showerhead and the Oxidant Seal filter capsuleWhat if your shower could do more: the benefits of filtering the water you rinse inHair panel: brittle, damage-prone hair into smoother strands that shineSkin panel: calmer skin by addressing the chlorine in shower waterSmiling under the full spray, the filter capsule visible above the head

The showerhead that proves itself in 30 seconds.

Neutralizes free chlorine AND chloramine. The 25-strip kit in the box lets you check it yourself.
Free with your order · $82 of extras
FREE · $19 VALUE25-Strip 16-in-1 Test Kit
FREE · $29 VALUEYour City's Water Report Card
FREE · $24 VALUESalon-Color Survival Guide
FREE · $10Free & Fast US Shipping
Add to Cart · $179
60-Day Money-Back
Test It Yourself
5-Minute Install
Secure Checkout
Founding 100: the first 100 orders get their first replacement cartridge free, for a two-strip photo and an honest review, good or bad.
softer-feeling hair calmer, less tight skin full 2.2 GPM pressure chloramine actually covered proof on a strip, not a promise

time to upgrade from your old showerhead

City water is disinfected with chlorine and chloramine. Great for pipes. Not great for the largest organ of your body.

protect your skin
less of the tight, itchy after-shower feeling
protect your hair
stop stripping it in hot chlorinated water daily
keep your pressure
2.2 GPM, the full-pressure US standard
verify it works
dip two strips, watch the chlorine pad tell the story
Old ordinary showerhead crusted with limescale spraying weak uneven jetsORDINARY FILTER
The Litmus Showerhead raining at full pressureLITMUS

So you bought a filter. And nothing changed.

It probably ran on ordinary activated carbon, and carbon traps. It is a sponge, and a sponge barely touches chloramine even when it is brand new. If your city disinfects with chloramine, and over 1 in 5 Americans get it, your old filter was never going to work no matter what you paid.

The Oxidant Seal doesn't trap. It converts. KDF-55 and calcium sulfite neutralize free chlorine on contact, then a dedicated Vitamin C stage takes apart the chloramine that carbon-only filters ignore.

When the oxidants stop coming, your conditioner finally gets to do its job, and your skin stops pulling tight an hour after you towel off.

$201 of value in the box · From $129
Seal Your Shower

60-day money-back · free US shipping

About 98% of US water systems disinfect with chlorine-based chemicals. Over 1 in 5 Americans get chloramine, the one your old filter missed.

The cartridge runs 15 stages of filtration. These are the four that do the heavy lifting, and what each one does:

calcium sulfite
neutralizes free chlorine on contact, even in hot water at full flow
KDF-55
copper-zinc alloy that converts chlorine and holds back dissolved metals
Vitamin C stage
ascorbic acid, the chemistry cities themselves use to de-chloraminate water
coconut carbon + mesh
polishes odor and catches sediment before the spray plate

no tools, no plumber, renter-safe

your best shower in three steps

1.

unscrew the old head

Two hands unscrewing the old showerhead from the shower arm
2.

twist on your Litmus

Twisting the filter capsule onto the shower arm by hand
3.

step under the water

Standing under the full spray with the filter capsule mounted above the showerhead

Everything you need comes in the box. Standard half-inch US fitting, plumber tape included, under five minutes. Dip a test strip the day it arrives, then re-test on day 45 and day 90: when color starts coming back on the strip, that is your cartridge telling you it is time to swap.

The Litmus Showerhead and the Oxidant Seal filter capsule One 16-in-1 water test strip from the 25-strip kit that ships in every box

everything you get

What's in the box.

The Litmus Showerhead + 15-stage Oxidant Seal core$129
25-Strip 16-in-1 Water Test Kityour proof, before and after$19
Your City's Water Report Carddigital · lands in your inbox with your order confirmation$29
Salon-Color Survival Guidedigital · lands in your inbox with your order confirmation$24
Plumber tape, spare washers + install guideIncluded
$201 of value in the box · From $129

we did the reading

We read 55 reviews of this category.
Here's the pattern.

Running both hands through soaking wet hair under the shower Warm shower water beading on the skin of a shoulder and collarbone

"Neither have given any noticeable results. My hair is still dry and my skin still itches."

Real review of two budget filtered showerheads, r/Haircare. This is the gap the Oxidant Seal exists to close.

"Spent a fortune on skincare before realizing the problem was coming out of my showerhead."

Real review, skincare community. The water comes first. Everything else is damage control.

100

The Founding 100. The first 100 customers who send us their two-strip photo and their honest take, good or bad, get their first replacement cartridge free. Their words become this section. Proof, not adjectives.

Litmus vs the filter you already tried

LITMUSORDINARY FILTERED SHOWERHEADS
Dedicated chloramine stage (Vitamin C)Rarely
KDF-55 + calcium sulfite conversion coreSometimes
Test kit in the box to verify it works25 strips
Money-back window60 daysUsually 30 days
Water pressure covered by the guarantee
Subscription requiredNoOften

the test-it-yourself 60

Don't trust us. Test us.

Run the strips the day it arrives, then again on day 45, after your hair and skin have had six weeks of de-chlorinated water to show you the difference. If you do not like what the pads show, or you simply do not like the shower, email us within 60 days for a full refund. In most cases you do not even ship it back: no return shipping, no photos, no restocking fee, no hoops.

And the pressure promise: if this showerhead drops your water pressure, that counts too. Send it back, on us.

We can run a guarantee this wide because the proof ships in the box: the strips settle it long before an email ever would.

Start The 60-Day Test

Litmus is for you if your water is city water (about 98% of US water systems disinfect with chlorine or chloramine), you have already tried products or a cheap filter that changed nothing, and you want proof before promises.

It is not for you if you are on a private well with no chlorine, or your only problem is limescale. Hard-water minerals need a whole-home softener, and we would rather tell you that now than after you buy.

asked and answered

I already tried a shower filter and it did nothing. Why would this be different?
Because it probably ran on carbon alone, and carbon barely touches chloramine. The Oxidant Seal runs two dedicated conversion stages, then hands you 25 strips so you can watch the difference instead of taking our word for it.
How do I know this isn't the same snake oil?
You don't have to know. You test. Dip one strip in unfiltered water and one in Litmus water and compare the chlorine pads side by side. If the water doesn't change, email us inside 60 days for a full refund.
Will it fix my hard water?
No, and anyone who says their showerhead softens water is overclaiming. Litmus does not remove dissolved calcium or magnesium. What it removes is free chlorine and chloramine, the disinfectants drying out your skin and hair.
Is it going to kill my water pressure?
No. The head is rated at 2.2 gallons per minute, the full-pressure US standard, and the filtration core sits upstream of the spray plate so the spray stays strong.
Am I going to get locked into a subscription?
Never. Cartridges last about 90 days of daily showers and swap in seconds. Buy them when you want them, or grab the Year bundle and forget about it.
Will it fit my shower?
If you are in the US, almost certainly. It threads onto the standard half-inch fitting American shower arms use, plumber tape comes in the box, and it goes on by hand in about five minutes. Renter-safe: your old head screws back on just as easily when you move out.
How long until I notice something?
The strips show the chlorine difference the same day. Hair and skin are individual: most people describe the change in how their hair and skin feel over the first weeks. That is exactly why the guarantee runs 60 days, not 30.

Stop showering in pool water.

Install it in five minutes. Test it the same day. Sixty days to change your mind. Waiting only buys you more showers in the same water.

Get The Litmus Showerhead

60-day money-back · free US shipping · no subscription

Sunlit pool water, the light rippling across the surface