What Pool Water Is Actually Doing to Your Hair (And How to Undo It)
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Pool day is one of life's simple joys. Like Ken is to beach, we are to pool, enjoying sunshine, an ice-cold drink, that one inflatable flamingo that's seen better days. What's not to love?
Well, your hair has some notes.
You already know the obvious stuff:
- The slightly stiff, slightly crunchy texture when you towel off
- The way your hair feels weirdly heavier wet and weirdly straw-ier dry
- The chlorine smell that sticks around through dinner and into the next morning's coffee
- Maybe even that classic horror-movie moment when a blonde friend climbs out of the pool with hair that's gone subtly… green
But the sneakier damage is the part nobody warns you about. The slow color fade you don't notice for two weeks. The split ends that show up in August out of nowhere. The way your curls just don't curl the same after a heavy swim summer. The dryness that creeps in even though you're conditioning every day. The reason your scalp feels tight and itchy by week three of pool season.
It's all connected. And it's all happening because pool water leaves stuff in your hair that your everyday shampoo isn't built to take out.
The good news: the fix is genuinely simple. Two products, two steps. We'll get to it. But first, let's talk about what's actually going on up there — because once you understand it, the solution makes a lot more sense.
What's actually in pool water (besides, you know, water)
Get cozy, this is the part where we get a little science-y. (Don't worry, no pop quiz.) The villain origin story starts with chlorine, but it's a whole ensemble cast. Here's the lineup:
1. Chlorine, doing its job too well.
Chlorine is in pools to kill bacteria, which is great for you and bad for whatever's trying to live in there. The catch: when chlorine dissolves in water, it forms hypochlorous acid, which is a strong oxidizer. And oxidizers don't really care what they're oxidizing — they'll go after the natural sebum on your scalp and the lipids inside your hair shaft just as happily.
Translation: your scalp's protective oil layer gets stripped, and your hair starts losing its internal moisture infrastructure.
2. Mineral buildup, the silent freeloader.
Pool water also picks up dissolved minerals like copper, calcium, iron, and manganese, mostly from the water source itself, the pipes, or copper-based algaecides.
When chlorine hits these metals, it oxidizes them. And oxidized metals love to glom onto the proteins in your hair. They're like that one houseguest who shows up for the weekend and somehow stays a month.
3. The cuticle situation.
Your hair's outermost layer is the cuticle: overlapping scales that keep moisture in and damage out. Chlorine and oxidative stress lift those scales up, leaving your strands more porous, rougher to the touch, and way more vulnerable to whatever comes next.
4. Sun, the chaos amplifier.
UV light supercharges everything above. Sun exposure on chlorinated, mineral-coated hair creates reactive oxygen species (the kind of phrase that sounds dramatic because it is), which break down keratin, oxidize the lipids in your strands, and accelerate color fade. A pool day in direct sun is basically a triple-threat to your hair.
So no, it's not in your head. Your hair really does feel different after a long pool day. There's a chemical reason for the "wait, why is my hair like this" moment.
About that green hair situation
Let's address the elephant in the kiddie pool. If you (or your kid, or your highlighted-blonde best friend) have ever climbed out of the water looking faintly mermaid-coded, you've probably blamed chlorine. Fair guess. Wrong answer.
The actual culprit is copper.
Here's the deal. Copper gets into pool water from a few places: the water source, the pipes, or — most commonly — copper-based algaecides used to keep the pool from going full swamp. When chlorine in the pool hits that copper, it oxidizes it, the same way the Statue of Liberty went from shiny copper-orange to that classic green patina.
The oxidized copper then binds to keratin (the main protein in your hair), and on light or porous strands, that bond shows up as a visible green tint. The condition even has a fancy medical name: chlorotrichosis. (Now you have a word to drop at parties.)
Why blondes get hit hardest:
- Light hair shows it more. Brunette and dark-haired folks pick up just as much oxidized copper, but the green just doesn't show up against the darker pigment.
- Porous hair grabs more copper. Bleached, highlighted, heat-damaged, or chemically treated hair has a more compromised cuticle and more "binding sites" for copper to latch onto. Healthier cuticle = less green.
- Lower pH water makes copper more reactive. Pools that aren't well-balanced are basically green-hair greenhouses.
Quick legal-ish note from us: we're not promising our products will reverse green hair specifically. Treating already-green hair usually needs a chelating treatment from a pro stylist (your colorist will know what to do).
What our routine can do is help prevent buildup from accumulating in the first place by getting chlorine, oxidized metal residue, and product gunk out of your strands before it has a chance to turn into a Statue of Liberty situation. Best defense is a good offense (sorry, it’s the NBA playoffs as we write this, we can’t help ourselves).
Pool hair, by hair type
Because chlorine is, in fact, a respecter of no hair type. Here's roughly what you're dealing with depending on what's growing out of your head.
If your hair is wavy or curly — you got the short end of the chlorine stick, sorry. Curly and wavy textures are naturally drier because your scalp's oils have a harder time traveling down a coiled strand. Your cuticles also tend to be more raised, which means chlorine penetrates faster and dries you out more aggressively.
After-pool care for waves and curls is non-negotiable: rinse fast, clarify thoroughly, and follow with a deep conditioning treatment. Skip any of that and you're looking at frizz, definition loss, and the dreaded "my curls just won't curl anymore" week.
If your hair is color-treated or bleached — your cuticle is already compromised from the chemical processing, so chlorine and minerals get in faster, color fades faster, and brassiness or unwanted tones (hi, green) show up faster. The masque step is doing a lot of the heavy lifting for you here.
If your hair is fine or thin — fine hair gets weighed down easily, but it also dries out fast and breaks easier when stripped. The good news: a lightweight clarify-and-restore routine is exactly what you need. The bad news: skipping the conditioner step will leave you straw-like by week two of summer.
If your hair is thick, coarse, or coily — chlorine still strips moisture, you'll just feel it more in your ends than your scalp. Deep conditioning isn't optional for you in pool season; it's the whole point.
If your hair is straight and untreated — congrats, you're playing pool season on easy mode. You still need to clarify and condition, but you can probably get away with doing it less often than the rest of us.
So what do we actually do about it?
Here's the simple version: strip and restore.
That's the entire game. Two steps. Take out what the pool put in, then put back what the pool took out. Done.
Your everyday shampoo is great for everyday hair. After a real pool day? It's underqualified. Most daily shampoos are formulated to be gentle for repeat use, which means they don't have the cleansing power to lift mineral buildup or stubborn chlorine residue. They sit on top of the problem instead of getting through it.
Same goes for your everyday conditioner. It hydrates for normal-day moisture loss. It's not built to put back the kind of moisture a full day of sun + chlorine takes out.
That's why we made the Pool Day Detox Bundle. Two products, one job:
Step 01 — Aliis Clarifying Shampoo (strip it out)
This is the reset button. It's a plant-based, sulfate-free clarifying shampoo built to actually lift chlorine, mineral deposits, and product residue out of your scalp and hair — without going scorched-earth on your strands.
The MVP ingredients doing the work:
- Cocamidopropyl Hydroxysultaine — sounds like a chemistry final, is actually a coconut-derived cleanser. It lifts buildup and metal residue gently but thoroughly. Biodegradable. Sensitive-scalp friendly. Not scary.
- Sodium Laurylglucosides Hydroxypropylsulfonate — a plant-derived surfactant that breaks down the kind of stubborn residue your daily shampoo just can't touch.
- Betaine — keeps the cleansing process from tipping into "now my hair feels like hay" territory. Balance, baby.
- Citric Acid — closes the cuticle back down after cleansing so your strands are smooth and primed for the next step.
Step 02 — Aliis Hair Masque & Butter (put it back)
The pool took your moisture, your softness, your shine. The masque gives it all back. This is the deep-conditioning portion of the program: rich, nourishing, and exactly what stripped, sun-baked hair is begging for. Slather it on roots to ends, let it hang out for 3 to 5 minutes (longer if you're feeling extra), rinse.
The good stuff inside:
- Ashwagandha — adaptogen for stressed-out strands. And a full day of UV plus chlorine? That's stress.
- Baobab Oil — the heavy hitter for replenishing moisture lost to the pool and sun.
- Buriti Fruit Oil — rich in beta carotene, which helps repair oxidative damage from sun exposure.
- Pequi Fruit Oil — locks down the cuticle, seals out frizz, and keeps your hair looking smooth long after you've toweled off.
- Turmeric & Ginger — calm down a scalp that's been through the wringer.
- Gardenia & Citrus Extracts — because after all of that, your hair deserves to smell like it just got back from somewhere with a beach club.
The Pool Day Detox Bundle — only $40 ($16 savings!)
Two products. Built for what your daily routine isn't built for.
What's inside:
- Aliis Clarifying Shampoo
- Aliis Hair Masque & Butter
$40 even. That's $16 off buying them separately, and a better deal than our buy-one-get-one-half-off math (we did it, we rounded down, you're welcome).
Bonus: how to actually take care of your hair around pool days
Because the best detox is the one you didn't fully need. A few small things you can do to make your pool day softer on your strands:
1. Soak your hair in clean water before you swim. Hair is a sponge. If it's already full of fresh water, it can't absorb as much chlorinated water. This trick is free and weirdly effective.
2. Pre-treat with a few drops of Juveniis Hair & Skin Oil. Smooth a little through your ends and lengths before you swim. The oil acts like a thin barrier and slows how fast chlorine and minerals can get in. Yes, this is also our oil. No, we're not sorry.
3. Rinse immediately when you get out. Don't wait until you get home to wash. Even just a quick fresh-water rinse at the pool deck dilutes whatever's already on your hair and limits the damage.
4. Don't use Daily Shampoo on a heavy pool day. Save your daily routine for daily life. After serious pool exposure, go straight to clarifying. Once weekly is plenty for most swimmers; bump it up if you're in the water near-daily.
5. Sun protection counts. A hat or scarf isn't just an accessory — it cuts way down on UV-driven damage to your already-stressed strands. (And, like, hats are cute.)
6. Long hair? Braid it. Or bun it. Less surface area exposed to the water means less chlorine soaking in. Bonus points: looks effortless, requires zero effort.
Go ahead, get back in the water
Here's the thing about pool season: you're going to swim. We're not going to tell you to skip the thing that makes summer summer. Nobody's putting their hair in a bubble until September, and they shouldn't have to.
What you can do is stop letting a great pool day cost you a great hair week. The damage isn't mysterious anymore: chlorine strips, copper deposits, the sun makes it worse, your daily routine can't keep up. Now you know. And now you have something that actually addresses it instead of pretending a regular shampoo will do.
So pack the bundle next to the sunscreen. Swim until your fingers prune. Stay until the lifeguards start giving you the look. Your hair is going to be fine.
Better than fine, honestly.
