Popular New Calculator Checklist Community Guides Product Guides Live Cams My Pool

Results for "chlorine chemistry"

464+ Answers 2 New This Week Free
Pool VideosSee all →
Do Salt Water Pools Need Chlorine? Complete Chemistry Guide
Salt Water Medium 30 minutes 233 👍

Do Salt Water Pools Need Chlorine? Complete Chemistry Guide

This house came with a salt water pool system that the previous owner left in complete disarray, and I'm totally clueless about maintaining it. The pool store told me that salt water pools are "chlorine-free" which is why I made the investment, but now I'm reading conflicting information online.

Do I actually still need to buy and add chlorine to my salt water pool? I thought the salt system was supposed to handle all of that automatically. I'm worried I might be missing something important for keeping the water safe for my kids.…more
Does Pool Chlorine Lighten Hair? Chemistry & Protection Tips
Water Chemistry Easy 30 minutes 349 👍

Does Pool Chlorine Lighten Hair? Chemistry & Protection Tips

Between being a total pool newbie and having no clue about proper chlorine levels, I'm wondering if I'm accidentally bleaching my hair every time I swim. My daughter has been swimming almost daily and I swear her brown hair is starting to look lighter, almost with blonde streaks. Is this actually happening or am I imagining things?

The pool store told me to keep my chlorine levels between 1-3 ppm, and I've been pretty good about testing and adding chemicals. But now I'm wondering if the chlorine is actually bleaching her hair? If this is really happening, is there anything I can do to prevent it while still keeping the pool safe to swim in?…more
Can You Use Pool Chlorine in Your Spa? Safety & Chemistry
Water Chemistry Medium 30 minutes 202 👍

Can You Use Pool Chlorine in Your Spa? Safety & Chemistry

Wondering if I messed up my spa chemistry by adding pool chlorine yesterday to simplify maintenance — the water feels completely different now. The spa gets heavy use and runs at higher temperatures than the pool, so I want to make sure the chemistry requirements are compatible.

Specifically, I need to know if pool chlorine will work effectively in spa conditions, and whether the concentration levels and monitoring frequency need to be adjusted. Are there any safety considerations or chemical balance issues I should be aware of when using pool chlorine in a spa environment?…more
Do You Need to Shock Pool After Filling? Complete Guide
Water Chemistry Easy 2-4 hours 781 👍

Do You Need to Shock Pool After Filling? Complete Guide

Staring at my freshly filled pool with a bucket of shock in hand — is it safe to dump this in right away, or could it damage anything? We just finished filling our 18x36 inground pool after having some liner work done this spring. The water came from our well and looks crystal clear, but I'm wondering if I need to shock it before my family starts swimming? A neighbor mentioned something about always shocking after a fresh fill, but I'm not sure if that's necessary since the water looks fine. What's the proper procedure here? I have test strips but haven't checked the chemistry yet - wanted to get some advice first on whether shocking is a must-do step.…more
Do All Pools Need Liners? Pool Types and Liner Requirements
Above Ground Medium 30 minutes 397 👍 9

Do All Pools Need Liners? Pool Types and Liner Requirements

During my pool consultation, three different contractors gave me completely opposite answers about needing a liner, and now I'm wondering if someone's trying to upsell me.

I'm considering several options including above-ground pools, concrete inground pools, fiberglass shells, and even looked into natural swimming pools. Some contractors are telling me that every pool needs a liner, while others say certain types don't require them at all. I want to make sure I understand the liner requirements before making my final decision, especially since this affects both the initial cost and long-term maintenance.

Can someone break down which specific pool types actually need liners versus which ones can function without traditional vinyl liners? I'd appreciate any insight into how the construction material affects liner requirements.…more
Does Pool Chlorine Make You Darker? Skin Effects Explained
Water Chemistry Easy 5 minutes 334 👍

Does Pool Chlorine Make You Darker? Skin Effects Explained

During my latest pool investigation, I've got my detective gear ready to figure out why my kids keep coming home darker after swim days — is chlorine actually changing their skin color? They're in the pool for hours during summer camp, and I want to make sure the chemicals aren't harming their skin or causing any unwanted changes.

Is chlorine known to darken skin, or could there be another explanation? I'm also concerned about whether the pool chemicals might be making their skin more vulnerable to other effects from being outdoors so much.…more
Does Pool Algae Consume Chlorine? Understanding Chlorine Loss
Algae Green Pool Medium 2-7 days 272 👍

Does Pool Algae Consume Chlorine? Understanding Chlorine Loss

About every time the temperature hits 85°F outside, my pool's chlorine levels nosedive to almost nothing, but stay rock solid during cooler days. I'm adding the same amount of chlorine I normally do, but it seems like it's disappearing quickly. A friend mentioned that algae might actually be 'eating' or consuming the chlorine somehow. Is this actually what's happening? I'm trying to understand the science behind it so I can tackle this problem more effectively. Should I be adding more chlorine, or is there a different approach I should take?…more
Can I Swim in Pool After Getting a Tattoo? Safety Guide
Maintenance Medium 30 minutes 336 👍

Can I Swim in Pool After Getting a Tattoo? Safety Guide

Every time I see that crystal-clear pool water calling my name, my week-old tattoo reminds me why I shouldn't have jumped in last weekend. I also recently got a tattoo and I'm wondering when it would be safe to take my first swim.

The pool store told me about keeping chlorine levels balanced, but they didn't mention anything about tattoos. How long should I wait before getting in? I want to make sure I don't risk any infections or mess up the healing process. Are there specific things I should check about my pool's chemical balance before swimming with a new tattoo?…more
What Are Chloramines in a Pool? Causes & Fixes
Water Chemistry Medium 1–2 hours for testing and shock treatment; ongoing prevention is a daily habit 41 👍 1

What Are Chloramines in a Pool? Causes & Fixes

My backyard pool has developed a really strong chemical smell, my kids come out with red burning eyes every single time they swim, AND a neighbor mentioned my chlorine levels might actually be too low despite the overpowering odor — all at the same time. I test my water regularly and I keep adding chlorine, so I'm confused why it smells so strong and still seems to be underperforming as a sanitizer.

Someone at the pool store told me what I'm smelling isn't really chlorine at all — it's something called chloramines or 'combined chlorine' — and that this actually means my free chlorine is being used up and isn't working properly. That really surprised me because I always assumed the strong smell meant there was too much chlorine in the water.

Can someone explain exactly what chloramines are, where they come from, and what I need to do to get rid of them? I want to understand the chemistry so I'm actually solving the problem and not just dumping in more product that won't help.…more
Can Pool Chlorine Make You Itchy? Causes & Solutions
Water Chemistry Medium 2-3 hours over 2 days 239 👍

Can Pool Chlorine Make You Itchy? Causes & Solutions

Finally planning to tackle my itchy pool problem this Saturday — need to figure out why my arms and shoulders keep getting irritated despite maintaining 2-3 ppm free chlorine in my 20,000-gallon inground pool. I maintain pH around 7.4 and alkalinity at 100 ppm, so the basic chemistry seems fine. The itching mainly affects my arms and shoulders where I spend the most time in the water.

I'm wondering if there's something I'm missing about chlorine that could be causing this skin irritation. I shock the pool weekly with calcium hypochlorite and use trichlor tablets in my skimmer, but the itchy feeling has gotten worse over the past month. Could it be the chlorine itself making me react this way, or is there another water chemistry issue I should be looking into? I've tried moisturizing after swimming but that only helps temporarily.…more
Do Salt Water Pools Get Algae? Prevention & Treatment Guide
Salt Water Medium 2-5 days depending on severity 388 👍 1

Do Salt Water Pools Get Algae? Prevention & Treatment Guide

Converted to salt water two seasons ago and thought algae would be a thing of the past. Woke up last Tuesday to green patches forming on the shallow end walls despite my salt cell running full blast. Starting to wonder if salt pools are really as algae-proof as everyone claims.…more
Do Saltwater Pools Need Chemicals? Yes - Here's What You Need
Salt Water Medium 30 minutes 275 👍

Do Saltwater Pools Need Chemicals? Yes - Here's What You Need

Despite having a 15,000 gallon saltwater pool with a functioning salt system, the pool store keeps pushing $200+ worth of chemicals every month. They keep telling me I need all these pH adjusters, alkalinity boosters, and other expensive stuff on top of the salt. I thought the whole point of going saltwater was to avoid dealing with a bunch of chemicals!

I'm looking to handle this myself and cut down on costs, but I want to make sure I'm not missing something important. Does the salt chlorine generator really only make chlorine? What other chemicals do I actually NEED to keep my water balanced, and what can I skip?…more
Do Salt Water Pools Have Chlorine? Yes - Here's Why
Salt Water Easy 5 minutes 282 👍

Do Salt Water Pools Have Chlorine? Yes - Here's Why

Already asked my neighbor about her "chlorine-free" saltwater pool, but mine definitely has chlorine — what am I missing here? I have a 20,000 gallon inground pool and I'm considering converting to a salt water system because I thought it meant no more dealing with chlorine chemicals. My neighbor has been telling me that salt water pools are "chlorine-free" and that's why they're gentler on skin and eyes.

But when I was talking to a pool supply store, the guy mentioned something about salt water pools still having chlorine, just generated differently? I'm confused because if there's still chlorine involved, what's the actual difference? I've been manually adding liquid chlorine to my pool for years and my levels typically run around 2-3 ppm, but I'm tired of the constant chemical additions and storage issues.

Can someone explain whether salt water pools actually contain chlorine or not? And if they do, how does that work with the salt system?…more
Should You Shock Pool When Chlorine Is Already High?
Water Chemistry Medium 2-6 hours 219 👍

Should You Shock Pool When Chlorine Is Already High?

Called my pool guy about my 8-year-old chlorination system that's overdosing — should I shock anyway or risk algae growth? My pool's total chlorine reading is showing high levels, but I'm uncertain whether shocking is still necessary or potentially harmful in this situation.

Specifically, I want to understand the relationship between total chlorine, free chlorine, and combined chlorine levels when determining shock treatment protocols. What's the proper testing sequence and decision matrix for shock treatment when initial chlorine readings appear elevated?…more
Do Saltwater Pools Need Chlorine? The Complete Truth
Salt Water Medium 45 minutes 260 👍

Do Saltwater Pools Need Chlorine? The Complete Truth

About two weeks into this rental with my first saltwater pool and the generator's been running constantly but the water stays green no matter what I do. I've thrown every chemical I can think of at this thing - algaecide, shock, clarifier - and nothing's working.

Do saltwater pools actually need regular chlorine added, or am I missing something else? I thought the whole point was that the salt system makes its own chlorine automatically. My levels seem off but I'm not sure if I should be manually adding chlorine to a saltwater pool or if that defeats the purpose entirely.…more

Pool Saved to Cloud

Your sync code (use this to load your profile on another device):

Write this down! There is no way to recover it if you lose it and clear your browser.
Pool Calculator Free all-in-one dosing tool