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

Results for "CYA"

464+ Answers 2 New This Week Free
Pool VideosSee all →
Can You Swim in a Pool with High CYA? Safety Guide
Water Chemistry Medium 15 minutes for testing, planning required for solutions 312 👍

Can You Swim in a Pool with High CYA? Safety Guide

Around two weeks after my CYA hit 80 ppm, my 20,000 gallon inground pool is eating through chlorine way faster than it should. The water looks clear and I've been maintaining my free chlorine at 3-4 ppm, but I'm having to add way more chlorine than usual to keep it there.

My main concern is whether it's actually safe for my family to swim in the pool with these high stabilizer levels. I've read conflicting information online - some sources say high CYA itself is dangerous, while others focus more on the chlorine effectiveness issue. We've got kids who use the pool daily during summer, so I want to make sure I'm not putting anyone at risk.

Should I be keeping everyone out of the water until I can get the CYA levels down, or is it more about making sure I can maintain proper sanitization despite the high stabilizer? I'm trying to figure out if this is an immediate safety concern or more of a long-term maintenance headache.…more
Do I Need CYA (Stabilizer) in My Pool? Complete Guide
Water Chemistry Medium 45 minutes 826 👍

Do I Need CYA (Stabilizer) in My Pool? Complete Guide

Three months into pool season and I'm still confused about CYA levels, especially with my kids already begging to dive in.

Our pool gets full sun most of the day, and I've been using regular chlorine tablets. A neighbor mentioned something about CYA protecting chlorine from the sun, but I'm not sure if it's actually necessary or just another chemical I don't need. Will my chlorine work properly without it, and is it safe to have CYA in the water with kids swimming?…more
Can You Shock Pool With High CYA? Safe Methods & Solutions
Water Chemistry Medium 2-4 hours 296 👍

Can You Shock Pool With High CYA? Safe Methods & Solutions

Between liquid chlorine and cal-hypo shock for tackling this algae mess when my cyanuric acid is already sitting at 80-90 ppm. I understand that high CYA reduces chlorine effectiveness, but I'm not sure about the correct approach for shocking under these conditions.

What's the proper methodology for calculating shock dosage when CYA is high? Should I be using a specific FC/CYA ratio, or is there a point where the CYA is too high to shock effectively? I want to ensure I'm using the right amount of chlorine without wasting chemicals or creating unsafe conditions.…more
How to Lower CYA (Stabilizer) in Pool - Complete Guide
Water Chemistry Medium 4-6 hours 389 👍

How to Lower CYA (Stabilizer) in Pool - Complete Guide

Already dealt with my 8-year-old pool's CYA climbing to over 100 ppm, way past the 30-50 ppm sweet spot — complete drain or partial fix? This is causing my chlorine to become significantly less effective, requiring much higher chlorine doses to maintain proper sanitization.

I've researched various approaches but I'm getting conflicting information about whether there are chemical products that can neutralize or reduce CYA levels directly. What are the proven methods for bringing cyanuric acid levels back down to the optimal range? I need a systematic approach that will actually work without wasting time on ineffective solutions.…more
What Free Chlorine Level Should You Maintain?
Water Chemistry Easy 15 minutes 1,122 👍 73

What Free Chlorine Level Should You Maintain?

Found myself staring at my test kit at 11pm trying to figure out if my chlorine reading is even close to where it should be. It's late and I want to get a dose in tonight if I'm off, but I genuinely don't know what number I'm shooting for. My pool has stabilizer in it and I've been guessing at a target for months.

Is there a universal number everyone aims for, or does it actually vary based on something? I keep seeing different ranges thrown around online and I can't figure out which one applies to my situation.…more
Can You Shock Pool After Adding Stabilizer? Complete Guide
Water Chemistry Medium 48 hours 436 👍

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
Does Pool Stabilizer Evaporate? CYA Levels Explained
Water Chemistry Medium 30 minutes 474 👍

Does Pool Stabilizer Evaporate? CYA Levels Explained

Woke up determined to finally understand pool chemistry, but now I'm standing in the pool store aisle staring at bottles of cyanuric acid and chlorine stabilizer with no clue which one I actually need. I know chlorine evaporates and needs constant replenishment, but I'm unclear about what happens to stabilizer over time.

Specifically, does CYA evaporate from the pool like chlorine does, or does it remain in solution indefinitely? If it doesn't evaporate, what are the actual mechanisms for removing excess stabilizer when levels get too high? I need to understand this for proper water balance management.…more
Can I Shock Pool After Adding Baking Soda? Complete Guide
Water Chemistry Medium 4-6 hours 934 👍 19

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
How to Winterize Your Inground Pool: Complete Step Guide
Winterizing Medium 6-8 hours over 2-3 weeks 204 👍

How to Winterize Your Inground Pool: Complete Step Guide

Planning to winterize my new inground pool using the same routine that worked perfectly on my old above-ground, but worried the chemical and equipment needs are completely different.

What are the specific steps I should follow for proper winterization? I'm particularly concerned about getting the water chemistry balanced correctly and protecting my filtration system and plumbing from freeze damage. Should I be targeting specific chemical levels, and what's the proper sequence for draining, cleaning, and applying winterizing treatments?…more
Do Indoor Pools Need Cyanuric Acid? Pool Stabilizer Guide
Water Chemistry Medium 30 minutes 200 👍

Do Indoor Pools Need Cyanuric Acid? Pool Stabilizer Guide

Standing in front of my indoor pool with a tight budget — is cyanuric acid actually necessary or can I skip this $30+ expense the pool store keeps pushing? Last time I was there, they insisted I needed cyanuric acid for my indoor pool and tried to upsell me on their "premium stabilizer package" for like $60.

My pool is completely indoors with no direct sunlight hitting it. I've been managing fine without CYA so far, but I'm wondering if there's actually a legitimate reason to use it? I'm all for DIY pool maintenance and cutting out unnecessary expenses, but I also don't want to mess up my water chemistry if stabilizer actually serves a purpose indoors.…more
How to Fix Pool Stabilizer Level: Complete CYA Guide
Water Chemistry Medium 2-3 days 780 👍

How to Fix Pool Stabilizer Level: Complete CYA Guide

Nobody warned me I'd walk out this morning to find my pool showing a 28 ppm CYA reading that has me completely baffled about what to do next.

For low stabilizer situations, what's the exact amount of cyanuric acid needed per gallon of pool water to achieve specific ppm increases? Additionally, I've read that high CYA levels present different challenges - what are the recommended approaches when levels exceed acceptable thresholds? I need reliable technical guidance for both scenarios to maintain proper water chemistry balance.…more
Can Pool Chlorine Make You Sick? Health Effects Explained
Water Chemistry Medium 45 minutes 249 👍

Can Pool Chlorine Make You Sick? Health Effects Explained

Opened my pool this season after adjusting pH levels, switching chlorine brands, and getting professional water testing — but my family still gets red eyes and skin irritation after swimming. We've been experiencing eye irritation and some skin redness after swimming, but I'm also worried about not having enough chlorine to kill bacteria and other nasties.

My latest test results show chlorine at around 5-6 ppm, and my CYA is sitting at about 50 ppm. I've been using liquid chlorine and shocking weekly with calcium hypochlorite. Sometimes the chlorine drops really low between treatments, maybe down to 0.5-1 ppm, especially after heavy use or rain.

What's the sweet spot for chlorine levels to avoid both chemical irritation and harmful bacteria? I want to keep everyone healthy but not sure if I should be targeting higher or lower numbers based on my current CYA level.…more
Does Pool Stabilizer Go Away? Understanding CYA Depletion
Water Chemistry Medium 30 minutes 325 👍

Does Pool Stabilizer Go Away? Understanding CYA Depletion

This is the third time this season my cyanuric acid levels have mysteriously dropped after being perfect all spring and I'm done guessing what's happening. Now I'm opening for this year and my CYA is reading lower than where I left it. Do I really need to keep adding stabilizer every year, or did I mess up my test somehow?

I thought once you get your stabilizer levels right, you're basically set for life. But apparently that's not the case? Just want to make sure I'm not throwing money at chemicals I don't actually need.…more
Do I Need Pool Shock? When and Why to Shock Your Pool
Maintenance Medium 2-4 hours 187 👍 1

Do I Need Pool Shock? When and Why to Shock Your Pool

During last week's heavy storms and downpours, my pool water turned cloudy and now I'm worried it's not safe for my kids to swim. My free chlorine levels seem to be dropping, and we've had some heavy rain lately plus the kids and their friends have been using the pool constantly this summer.

I keep hearing about pool shock but I'm not sure when I actually need to use it or what type is best. I just want to make sure the water is properly sanitized and safe for swimming. What are the signs that tell me I need to shock the pool, and how do I do it correctly?…more
How to Add Pool Stabilizer: Complete CYA Addition Guide
Water Chemistry Easy 30 minutes 2,165 👍

How to Add Pool Stabilizer: Complete CYA Addition Guide

CYA level dropped to 15 ppm after a heavy rain week and my chlorine is burning off by noon every day. Bought a bag of stabilizer but the instructions are vague — do I dissolve it first, pour it in the skimmer, broadcast it across the surface? Don't want to overdo it and end up with the opposite problem.…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