Popular New Guides Product Guides Tools Checklists My Pool

Results for "calcium-hardness"

606+ Answers 3 New This Week Free
Should I Turn Off Salt Cell When Shocking Pool? Expert Guide
Salt Water Medium 8-24 hours 240 👍

Should I Turn Off Salt Cell When Shocking Pool? Expert Guide

Staring at my salt cell wondering if I need to turn it off before shocking my pool — can't afford a $200 service call right now.

Should the salt chlorine generator be turned off while administering shock treatment, or can it continue running?

I want to ensure I'm following correct procedures to avoid any potential equipment damage or interference with the shock's effectiveness. What's the standard protocol for salt cell operation during chemical shock applications?…more
How Pool Salt Cells Work: Electrolysis Process Explained
Salt Water Medium 10 minutes 201 👍

How Pool Salt Cells Work: Electrolysis Process Explained

I tried figuring out how my neighbor's salt cell creates perfect chlorinated water while mine struggles, but I'm completely lost on how salt actually becomes chlorine.
Like, I get that I add salt to the pool and somehow it becomes chlorine, but what's the actual process happening in there?

Is it some kind of chemical reaction or what? And why does my pH always seem to creep up when the salt cell is running - is that related to whatever's going on inside the cell too?…more
Can I Clean Pool Filter With Bleach? Safe Methods Explained
Filters Medium 45 minutes 192 👍

Can I Clean Pool Filter With Bleach? Safe Methods Explained

Somewhere in my garage looking at this disgusting pool filter with brown sludge and nasty buildup caked all over the pleats, wondering if bleach is safe. Is this actually safe to do?

I have what I think is a cartridge filter (it's the white pleated kind), and I'm worried about damaging it or my pool equipment if I use the wrong cleaning method. The pool store told me about expensive filter cleaners, but I'm wondering if regular bleach from the grocery store would work just as well. Should I dilute it somehow, and are there any types of filters I should avoid using bleach on?…more
Can Pool Chlorine Clean Concrete? Safe Methods & Alternatives
Water Chemistry Medium 45 minutes 185 👍

Can Pool Chlorine Clean Concrete? Safe Methods & Alternatives

Between the humidity and recent rain, my concrete pool deck started showing these nasty green algae stains last week and now I'm wondering if pool chlorine can clean them off. My concrete pool deck is absolutely filthy with algae stains and dirt buildup, and nothing seems to work. I've scrubbed until my arms hurt and tried different cleaners, but these green stains just won't budge.

I have tons of pool chlorine sitting around and I'm wondering if I can use that to blast these concrete stains away? I don't want to damage the surface or create some kind of chemical disaster, but I'm running out of options. If chlorine works, what's the right way to dilute it? And honestly, are there better alternatives that might actually get this mess clean without all the guesswork?…more
How to Know If Your Pool Salt Cell Is Bad - 7 Warning Signs
Salt Water Medium 45 minutes 177 👍

How to Know If Your Pool Salt Cell Is Bad - 7 Warning Signs

Opened up my new place's pool equipment for the first time and this salt cell has crusty white buildup everywhere while chlorine levels keep tanking.

What are the telltale signs that a salt cell is actually failing? I don't want to replace it unnecessarily, but I also don't want to keep throwing money at chemicals if the real problem is a dead cell. Are there specific things I should check or test to know for sure?…more
How Long to Wait Before Swimming After Pool Chemicals
Water Chemistry Easy 30 minutes 171 👍

How Long to Wait Before Swimming After Pool Chemicals

Apparently I'm standing in my garage staring at three different pool chemicals I added this morning with no clue how long I actually need to wait before diving in. Yesterday I added liquid chlorine to bring my levels up from 1.2 ppm to around 3.0 ppm, and I wasn't sure if we could swim that evening or needed to wait until the next day.

I'm planning to shock the pool this weekend with calcium hypochlorite since we've had some cloudy water issues, and I also need to adjust the pH which has been running high at 7.8. The kids are eager to get back in the pool, but I want to make sure I'm following proper safety guidelines. Do different chemicals have different waiting periods, and should I always test the water first regardless of how much time has passed?…more
How to Raise Pool pH: Complete Guide to pH Increaser
Water Chemistry Easy 30 minutes 170 👍

How to Raise Pool pH: Complete Guide to pH Increaser

Before I dump chemicals into my pool, I'm trying to decide between adding baking soda or actual pH increaser to bring it up from 7.0. The pool store told me I need to raise it, but they mentioned a couple different chemicals and I'm honestly a bit confused about which one to use.

I've heard about soda ash and baking soda, but I'm not sure what the difference is or how much I should add to my 20,000 gallon pool. I really don't want to mess this up and swing it too far the other way. Should I be adding the chemicals slowly, and do I need to have my pump running when I do it? Any guidance would be really appreciated!…more

Still stuck on this pool issue?

Get a personalized answer from a verified pool expert. Describe your issue and get step-by-step help.

Chat with a Pool Expert
1,742 pool owners helped · Avg response under 5 min
Can You Vacuum Pool After Adding Chemicals? Safety Guide
Water Chemistry Medium 30-60 minutes 168 👍

Can You Vacuum Pool After Adding Chemicals? Safety Guide

Despite adding chlorine shock and algaecide yesterday, is it dangerous to vacuum my pool with my kids swimming here regularly? Can I start vacuuming immediately or do I need to wait? Don't want to mess up the chemical distribution or damage my equipment.…more
Can I Shock Pool After Adding Baking Soda? Complete Guide
Water Chemistry Medium 4-6 hours 167 👍

Can I Shock Pool After Adding Baking Soda? Complete Guide

Noticed my neighbor's pool stays crystal clear when he adds baking soda then shocks immediately, but mine turns cloudy every time — what's his secret? I added baking soda to raise my alkalinity this morning, but now I'm wondering about timing.

Can I go ahead and shock the pool right away, or do I need to wait? I don't want to waste the shock treatment or mess up my water chemistry. The pool store guy mentioned something about waiting but then tried to upsell me on their "premium" shock system. Just looking for straight answers on proper timing and whether I should test anything specific before shocking.…more
Can You Shock Pool After Adding Stabilizer? Complete Guide
Water Chemistry Medium 48 hours 167 👍

Can You Shock Pool After Adding Stabilizer? Complete Guide

Apparently I added stabilizer to my pool yesterday but now I'm second-guessing whether it's safe to shock it — did I mess up the timing? The pool store told me I needed it because my chlorine wasn't lasting very long in the sun. Now I'm wondering when it's safe to shock the pool - can I do it right away or do I need to wait?

I've heard that stabilizer takes time to dissolve and I don't want to mess up the chemical balance. Should I test the CYA levels first? And does having stabilizer in the water change how much shock I should use? Any guidance would be really appreciated!…more
Can Pool Chlorine Burn Your Skin? Chemical Safety Guide
Water Chemistry Medium 15 minutes 163 👍

Can Pool Chlorine Burn Your Skin? Chemical Safety Guide

Replaced my pool chlorine system after seeing my neighbor's kids swim all day with perfect skin, but mine still come out looking like lobsters. What are the specific conditions that lead to skin burns from pool chlorine, and what are the precise chemical parameters I should maintain to prevent skin irritation?

I'm particularly concerned about concentrated chemical exposure during maintenance procedures and want to know the exact chlorine levels that are safe for swimmers versus those that can cause chemical burns.…more
Can Green Pool Water Make You Sick? Health Risks Explained
Algae Green Pool Easy immediate recognition 161 👍

Can Green Pool Water Make You Sick? Health Risks Explained

Nobody believed me when I said our pool looked dangerous until my husband walked outside and said it resembles a literal swamp. I know it looks gross but is green water actually dangerous or just unsightly?

What kind of health problems can you get from swimming in algae water? Should I keep everyone out until it's crystal clear again?…more
Why Pool Alkalinity Gets Low: 7 Common Causes & Solutions
Water Chemistry Easy 30 minutes 155 👍

Why Pool Alkalinity Gets Low: 7 Common Causes & Solutions

Opened my pool this morning and the alkalinity had crashed again — only happens when it's above 85 degrees but stays perfectly normal during cooler weather. My kids swim in it almost daily during summer, so I'm really concerned about whether this is safe for them.

I'm trying to figure out what's causing this so I can fix it properly. We've had a lot of rain lately, and I've been shocking the pool more often because of increased usage. Could these things be making the alkalinity drop? What are the main reasons pool alkalinity gets low, and should I keep the kids out until I get it balanced again?…more
Can Pool Jets Leak? Diagnosis & Repair Guide
Leaks Medium 45 minutes 149 👍

Can Pool Jets Leak? Diagnosis & Repair Guide

I turned to a second opinion after my pool contractor quoted $3,000 to replumb my entire return system when I suspect these leaking jets might just need a simple repair. I keep losing water and can't pinpoint where it's going. The jets seem like the obvious suspect since they're these openings in the wall, but I honestly have no clue how they're put together or what could go wrong with them.

Is it even possible for the actual jets to leak? And if so, where would the leak typically happen - like around the edges where they meet the pool wall, or somewhere else entirely?…more
Do I Need to Wash Pool Filter Sand? Complete Guide
Filters Easy 30 minutes 149 👍

Do I Need to Wash Pool Filter Sand? Complete Guide

After years of perfect pool maintenance, my filter sand suddenly turns cloudy and clogs up every time the temperature hits 85 degrees outside. The new sand I bought looks pretty dusty and I'm wondering if I need to clean it first before putting it in the filter system.

I'm really concerned about water quality and don't want to introduce anything harmful or make the water cloudy for the kids. Should I be washing this sand before installation, or is it ready to go straight from the bag? What's the safest approach here?…more
PoolGuy810
Ask a Pool Expert Avg reply < 5 min

My Pool Settings

Hi, I'm Splash!
Need help setting up? I can walk you through it
Pool Info
Calculate volume
Climate & Cover
Typical Chemistry

Pre-fill calculators with your usual levels (optional)

30-50 chlorine, 70-80 SWG
60-80 recommended
250-350 recommended
Equipment

Select your equipment to personalize checklists

Sync across devices