{"id":104122,"date":"2025-08-25T17:27:32","date_gmt":"2025-08-25T17:27:32","guid":{"rendered":"https:\/\/homegnome.com\/blog\/?p=104122"},"modified":"2025-08-25T17:27:33","modified_gmt":"2025-08-25T17:27:33","slug":"fix-chlorine-lock","status":"publish","type":"post","link":"https:\/\/homegnome.com\/blog\/pool-care\/fix-chlorine-lock\/","title":{"rendered":"How to Fix Chlorine Lock"},"content":{"rendered":"\n<p>To fix chlorine lock, you need to lower the cyanuric acid level and balance the pH. You do that by partially draining and refilling the pool. Once the water is stable, you shock it at night with unstabilized chlorine. This combination of dilution and shocking solves the chlorine lock issue and gets your sanitizer working again.<br><br>In this article, I\u2019ll walk you in detail through the steps and measurements you\u2019ll need to effectively fix chlorine lock and jumpstart your pool\u2019s sanitation system.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes has-medium-font-size\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Project Difficulty<\/strong>: Beginner<br><strong>Estimated Time<\/strong>: 24 hours (including wait times for chemicals to circulate and work)<br><strong>Project Cost<\/strong>: $100\u2013$120<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<div class=\"wp-block-ub-table-of-contents-block ub_table-of-contents\" id=\"ub_table-of-contents-1eeab417-039c-44c7-bdaf-0f52d90a7d13\" data-linktodivider=\"false\" data-showtext=\"show\" data-hidetext=\"hide\" data-scrolltype=\"auto\" data-enablesmoothscroll=\"false\" data-initiallyhideonmobile=\"false\" data-initiallyshow=\"true\"><div class=\"ub_table-of-contents-header-container\" style=\"\">\n\t\t\t<div class=\"ub_table-of-contents-header\" style=\"text-align: left; \">\n\t\t\t\t<div class=\"ub_table-of-contents-title\" style=\"\">In this article:<\/div>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t<\/div><div class=\"ub_table-of-contents-extra-container\" style=\"\">\n\t\t\t<div class=\"ub_table-of-contents-container ub_table-of-contents-1-column \">\n\t\t\t\t<ul style=\"\"><li style=\"\"><a href=\"https:\/\/homegnome.com\/blog\/pool-care\/fix-chlorine-lock\/#0-supplies-needed\" style=\"\">Supplies Needed<\/a><\/li><li style=\"\"><a href=\"https:\/\/homegnome.com\/blog\/pool-care\/fix-chlorine-lock\/#1-how-to-break-chlorine-lock\" style=\"\">How to Break Chlorine Lock<\/a><\/li><li style=\"\"><a href=\"https:\/\/homegnome.com\/blog\/pool-care\/fix-chlorine-lock\/#6-how-to-prevent-chlorine-lock\" style=\"\">How to Prevent Chlorine Lock<\/a><\/li><li style=\"\"><a href=\"https:\/\/homegnome.com\/blog\/pool-care\/fix-chlorine-lock\/#11-faq-about-fixing-chlorine-lock\" style=\"\">FAQ About Fixing Chlorine Lock<\/a><\/li><\/ul>\n\t\t\t<\/div>\n\t\t<\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"0-supplies-needed\">Supplies Needed<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pool water test kit (ideally a DPD or FAS-DPD test kit that can measure free chlorine, total chlorine, pH, and CYA accurately)<\/li>\n\n\n\n<li>Unstabilized chlorine shock (avoid stabilized chlorinating products for this fix, because they contain CYA, which could worsen the problem)<\/li>\n\n\n\n<li>Non-chlorine shock (optional)<\/li>\n\n\n\n<li>pH adjusters<\/li>\n\n\n\n<li>Protective gear (chemical-resistant gloves and safety goggles)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"1-how-to-break-chlorine-lock\">How to Break Chlorine Lock<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-step-1-test-and-identify-the-cause\">Step 1: Test and Identify the Cause<\/h3>\n\n\n\n<p>Use a quality test kit to get a clear picture of your water chemistry. You need to know your free chlorine, total chlorine, pH, and CYA levels. We have a great guide on <a href=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgpool-care\/how-to-test-pool-water\/\">How to Test Pool Water<\/a>, if you need some tips for accurate home testing.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If the total chlorine is much higher than free chlorine, you have a buildup of ineffective chloramines.<\/li>\n\n\n\n<li>If your CYA is above 80\u2013100 ppm, your pool is likely over-stabilized<\/li>\n\n\n\n<li>If your pH is above 8.0, your chlorine\u2019s sanitizing power is reduced<\/li>\n<\/ul>\n\n\n\n<p>These numbers will tell you whether to focus on shocking away chloramines, diluting high CYA, or both.<\/p>\n\n\n\n<p>Chlorine lock is rare and is often confused with other pool chemistry issues. Make sure you fully understand what\u2019s going on in your pool before moving forward.<\/p>\n\n\n\n<p><strong>Read more:<\/strong> <a href=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgfencing\/the-best-fences-for-high-winds\">What Is Chlorine Lock?<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-step-2-balance-ph-and-reduce-stabilizer-if-needed\">Step 2: Balance pH and Reduce Stabilizer (If Needed)<\/h3>\n\n\n\n<p>Before shocking, you must prep the water. Pool pro Jeremy Yamaguchi, CEO of <a href=\"https:\/\/cabanapools.com\" target=\"_blank\" rel=\"noreferrer noopener\">Cabana<\/a>, explains that \u201cto break chlorine lock, it can help to partially drain the pool and refill it. This helps to adjust pH and dilute CYA levels in your pool pretty effectively, and from there it&#8217;s easier to effectively shock the pool and get levels back to normal.\u201d<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Adjust the pH to the 7.2\u20137.4 range. This makes the chlorine shock much more effective.<\/li>\n\n\n\n<li>If CYA is high, you must lower it. The only practical way is to partially drain and refill the pool, as CYA does not break down on its own.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-step-3-shock-the-pool-with-unstabilized-chlorine\">Step 3: Shock the Pool with Unstabilized Chlorine<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"900\" src=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgwp-content\/uploads\/2025\/06\/pool-shock.jpg\" alt=\"Chlorine shocking power and tablets\" class=\"wp-image-101949\" srcset=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/06\/pool-shock.jpg 1200w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/06\/pool-shock-300x225.jpg 300w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/06\/pool-shock-1024x768.jpg 1024w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/06\/pool-shock-768x576.jpg 768w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/06\/pool-shock-928x696.jpg 928w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: tetxu \/ Adobe Stock<\/figcaption><\/figure>\n\n\n\n<p>With the water prepped, it&#8217;s time to shock the pool to achieve breakpoint chlorination. The goal here is to raise your sanitizer levels drastically, and you can learn more about the methods in our guide on <a href=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgpool-care\/how-to-increase-free-chlorine-in-your-pool\/\">How to Increase Free Chlorine in Your Pool<\/a>.<\/p>\n\n\n\n<p>Yamaguchi advises that \u201cusing unstabilized chlorine tends to work best.\u201d For this reason, use a strong, unstabilized chlorine shock like Cal Hypo or liquid chlorine to avoid adding more CYA.&nbsp;<\/p>\n\n\n\n<p>If you&#8217;re wondering why shock differs from normal chlorination, read our <a href=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgpool-care\/difference-between-shock-chlorine\/\">Shock vs. Chlorine: What\u2019s the Difference?<\/a> article for in-depth information.<\/p>\n\n\n\n<p>To calculate the dose, the simplest rule of thumb is to triple-shock the pool, which is about three times the normal dose. This is about 3 pounds for every 10,000 gallons of water for Cal Hypo.&nbsp;<\/p>\n\n\n\n<p>For a more precise approach, you can raise the free chlorine level to ten times the amount of your combined chlorine reading. For example, if your CC is 2 ppm, you must add enough shock to raise the free chlorine level to 20 ppm.<\/p>\n\n\n\n<p>Yamaguchi gives us one last tip: \u201cMake sure to do this at night.\u201d Shocking at night helps protect the chlorine from sunlight. Run the pump for at least 8 to 12 hours after shocking to ensure the chlorine is distributed thoroughly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"5-step-4-retest-and-repeat-if-necessary\">Step 4: Retest and Repeat if Necessary<\/h3>\n\n\n\n<p>After letting the shock work overnight, retest your water:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You should now see a solid free chlorine reading and a combined chlorine level near zero (below 0.2 ppm). If so, you\u2019ve broken the lock.<\/li>\n\n\n\n<li>If free chlorine is still zero or CC is still high, you may need a second round of shock.<\/li>\n\n\n\n<li>Once the lock is broken, brush and vacuum any dead algae or debris. Don\u2019t let anyone swim until the free chlorine level has returned to a safe 1\u20134 ppm.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"6-how-to-prevent-chlorine-lock\">How to Prevent Chlorine Lock<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"7-test-your-water\">Test Your Water<\/h3>\n\n\n\n<p>Stay on top of your free chlorine, combined chlorine, pH, and CYA levels. Yamaguchi says, &#8220;The best preventative measure is simply testing your pool water regularly. Instead of testing it weekly, try to test it daily or at least every other day.&#8221; This frequency lets you spot any issues before they become problematic.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"8-maintain-proper-chlorine-levels\">Maintain Proper Chlorine Levels<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgwp-content\/uploads\/2025\/05\/testing-pool-ph-1.jpeg\" alt=\"Hands holding a pool test strip next to a comparison chart to check pH and chlorine levels in a bright blue swimming pool.\" class=\"wp-image-100733\" srcset=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/05\/testing-pool-ph-1.jpeg 800w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/05\/testing-pool-ph-1-300x200.jpeg 300w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/05\/testing-pool-ph-1-768x512.jpeg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: <a href=\"https:\/\/stock.adobe.com\/images\/checking-the-water-quality-of-a-pool-with-the-help-of-a-test-strip-with-ph-value-chlorine-and-algaecide\/523325452\" target=\"_blank\" rel=\"noreferrer noopener\">Evgeniya Sheydt<\/a> \/ Adobe Stock<\/figcaption><\/figure>\n\n\n\n<p>Don\u2019t let your free chlorine repeatedly crash to zero. It\u2019s easier for the pool to develop a demand (or algae bloom) if you allow chlorine to bottom out. Aim to keep free chlorine in the recommended range at all times.<\/p>\n\n\n\n<p>\u201cFrom my experience, the most ideal range is between 2\u20133 ppm, though you\u2019re usually okay down to 1 ppm or up to 4 ppm,\u201d Yamaguchi notes. He cautions that \u201conce it gets to 5 ppm and up, irritation can become significant,\u201d so more is not always better.<\/p>\n\n\n\n<p>If you need help on dosing and frequency, check out our <a href=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgpool-care\/how-to-add-chlorine-to-your-pool\">How to Add Chlorine to Your Pool<\/a> and <a href=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgpool-care\/how-often-to-add-chlorine-to-your-pool\/\">How Often to Add Chlorine to Your Pool<\/a> guides for more in-depth information.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"9-shock-on-a-schedule\">Shock on a Schedule<\/h3>\n\n\n\n<p>Regular shocking of your pool water helps break down chloramines and organic waste before they accumulate. During peak season, after heavy rainfall, a big pool party, or any event that dumps extra contaminants in the pool, give it a shock treatment. This will prevent chloramine buildup, so you\u2019ll rarely, if ever, see a chlorine demand crisis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"10-practice-good-pool-hygiene\">Practice Good Pool Hygiene<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgwp-content\/uploads\/2025\/07\/vacuum-pool-1024x683.jpg\" alt=\"utility worker cleaning the swimming pool with vacuum equipment\" class=\"wp-image-102719\" srcset=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/07\/vacuum-pool-1024x683.jpg 1024w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/07\/vacuum-pool-300x200.jpg 300w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/07\/vacuum-pool-768x512.jpg 768w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/07\/vacuum-pool-928x619.jpg 928w, https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/07\/vacuum-pool.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: <a href=\"https:\/\/stock.adobe.com\/in\/images\/utility-worker-cleaning-the-swimming-pool-with-vacuum-equipment\/300345453\" target=\"_blank\" rel=\"noreferrer noopener\">GDM photo and video<\/a> \/ Adobe Stock<\/figcaption><\/figure>\n\n\n\n<p>The cleaner you keep your pool, the less your chlorine has to fight, and the less likely you\u2019ll experience chlorine demand. Skim out leaves and debris, vacuum regularly, and keep your filter running. Also, encourage swimmers to shower before swimming to rinse off sweat, lotions, and oils because they\u2019ll use up chlorine quickly and create chloramines.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"11-faq-about-fixing-chlorine-lock\">FAQ About Fixing Chlorine Lock<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1754915229296\"><strong class=\"schema-faq-question\">Will chlorine lock fix itself?<\/strong> <p class=\"schema-faq-answer\">No, the chlorine lock won\u2019t resolve on its own. You\u2019ll need to either shock or dilute the pool to restore chlorine effectiveness.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754915236356\"><strong class=\"schema-faq-question\">Will fixing chlorine lock get rid of algae?<\/strong> <p class=\"schema-faq-answer\">Yes, resolving the chlorine lock usually kills algae, too. The shock process eliminates both chloramines and algae when done properly.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754915245456\"><strong class=\"schema-faq-question\">How do you fix chlorine lock in a hot tub?<\/strong> <p class=\"schema-faq-answer\">The easiest fix is to drain and refill the hot tub, then shock with unstabilized chlorine. This will reset stabilizer levels and restore the sanitizer&#8217;s effectiveness.<\/p> <\/div> <\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"12-breaking-the-chlorine-lock\">Breaking the Chlorine Lock<\/h2>\n\n\n\n<p>If your pool\u2019s chlorine seems \u201cstuck\u201d and ineffective, the solution usually comes down to two approaches: shocking the pool with a strong dose of chlorine or partially replacing the water.<\/p>\n\n\n\n<p>If you\u2019ve tested, balanced, shocked, and still feel unsure or just want an extra set of expert eyes, we can help you connect with experienced pros in your area who can quickly identify and fix any issues with your pool.<\/p>\n\n\n\n<p><a href=\"https:\/\/homegnome.com\/\"><em>Home Gnome<\/em><\/a><em>&nbsp;delivers the best home service experience at the click of a button. Book reliable, skilled services in seconds and leave the rest to us.<\/em><\/p>\n\n\n\n<p><strong>Read More<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgpool-care\/signs-too-much-chlorine-in-pool\">Signs of Too Much Chlorine in Your Pool<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/11\/gutter-in-heavy-rainfall-1.jpgwp-content\/uploads\/2023\/10\/roof-styles-illustration-1.jpgwp-content\/uploads\/2024\/09\/IMG_3418-1-1.jpgwp-content\/uploads\/2024\/06\/Pantone-colors.jpgwp-content\/uploads\/2024\/10\/Anthony-Brooks-150x150-1.jpgpool-care\/lower-chlorine-levels-in-pool\/\">How to Lower Chlorine Levels in Your Pool<\/a><\/li>\n<\/ul>\n\n\n\n<p>Main Photo: A man is performing a water quality test next to a pool. Image Credit: <a href=\"https:\/\/stock.adobe.com\/images\/active-pool-chemical-testing\/14545132\" target=\"_blank\" rel=\"noreferrer noopener\">Ernest Prim<\/a> \/ Adobe Stock<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To fix chlorine lock, test your water. If CYA is high, partially drain and refill. Then, shock the pool at night with unstabilized chlorine.<\/p>\n","protected":false},"author":9,"featured_media":104129,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[142],"tags":[476,517],"class_list":["post-104122","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pool-care","tag-chlorine-lock","tag-pool-chemistry"],"acf":[],"featured_image_src":"https:\/\/homegnome.com\/blog\/wp-content\/uploads\/2025\/08\/fix-chlorine-lock.jpg","author_info":{"display_name":"Adrian Nita","author_link":"https:\/\/homegnome.com\/blog\/author\/adrian-nita\/"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Fix Chlorine Lock<\/title>\n<meta name=\"description\" content=\"To fix chlorine lock, test your water. If CYA is high, partially drain and refill. Then, shock the pool at night with unstabilized chlorine.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/homegnome.com\/blog\/pool-care\/fix-chlorine-lock\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Fix Chlorine Lock\" \/>\n<meta property=\"og:description\" content=\"To fix chlorine lock, test your water. If CYA is high, partially drain and refill. 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