{"id":35347,"date":"2026-07-10T16:21:31","date_gmt":"2026-07-10T20:21:31","guid":{"rendered":"https:\/\/www.ljpools.com\/home\/?p=35347"},"modified":"2026-07-10T16:32:09","modified_gmt":"2026-07-10T20:32:09","slug":"how-to-get-rid-of-mustard-algae-in-your-swimming-pool","status":"publish","type":"post","link":"https:\/\/www.ljpools.com\/home\/how-to-get-rid-of-mustard-algae-in-your-swimming-pool\/","title":{"rendered":"How to Get Rid of Mustard Algae in Your Swimming Pool"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">How to Get Rid of Mustard Algae in Your Swimming Pool<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;ve noticed yellow or mustard-colored patches clinging to the walls or floor of your pool, you&#8217;re likely dealing with <strong>mustard algae<\/strong>. Unlike green algae, mustard algae is extremely stubborn and can quickly return if it&#8217;s not treated properly. It thrives in shaded areas, clings to pool surfaces, and can even survive on pool toys, ladders, and cleaning equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At <strong>L&amp;J Pools<\/strong>, we recommend using <strong>ProTeam Pool Chemicals<\/strong> for an effective, professional-grade treatment. Here&#8217;s our step-by-step guide to eliminating mustard algae and preventing it from coming back.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Is Mustard Algae?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Mustard algae, sometimes called yellow algae, is a chlorine-resistant algae that often appears as a yellow or brown dust-like coating on pool walls, steps, and corners. It can easily be mistaken for dirt or pollen, but if it quickly returns after brushing, algae is usually the culprit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 1: Balance Your Pool Water<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before treating the algae, make sure your pool chemistry is properly balanced.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended Water Chemistry:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\">pH: <strong>7.2\u20137.6<\/strong><\/li>\n\n\n\n<li class=\"\">Total Alkalinity: <strong>80\u2013120 ppm<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Also, clean or backwash your filter to ensure maximum circulation during treatment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 2: Brush the Entire Pool<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Thoroughly brush every surface in the pool, paying special attention to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\">Walls<\/li>\n\n\n\n<li class=\"\">Floor<\/li>\n\n\n\n<li class=\"\">Steps<\/li>\n\n\n\n<li class=\"\">Behind ladders<\/li>\n\n\n\n<li class=\"\">Corners<\/li>\n\n\n\n<li class=\"\">Shaded areas<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Brushing breaks the algae loose so the treatment can work more effectively.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 3: Treat with ProTeam Mustard &amp; Black Magic<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Apply <strong>ProTeam Mustard &amp; Black Magic<\/strong> directly to the affected areas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Recommended Dosage<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Pool Size<\/th><th>Normal Treatment<\/th><th>Heavy Infestation<\/th><\/tr><\/thead><tbody><tr><td>10,000 gallons<\/td><td>4 oz<\/td><td>8 oz<\/td><\/tr><tr><td>20,000 gallons<\/td><td>8 oz<\/td><td>16 oz<\/td><\/tr><tr><td>30,000 gallons<\/td><td>12 oz<\/td><td>24 oz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">For severe algae growth, use the higher dosage.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 4: Shock the Pool<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Immediately after adding Mustard &amp; Black Magic, shock the pool using <strong>ProTeam Quick Shock<\/strong> or <strong>ProTeam Power Magic<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Dosage:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>1 pound per 10,000 gallons<\/strong><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Pool Size<\/th><th>Quick Shock Needed<\/th><\/tr><\/thead><tbody><tr><td>10,000 gallons<\/td><td>1 lb<\/td><\/tr><tr><td>20,000 gallons<\/td><td>2 lb<\/td><\/tr><tr><td>30,000 gallons<\/td><td>3 lb<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This combination helps destroy algae that regular chlorine treatments may leave behind.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 5: Run the Filter Continuously<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Operate your pump and filter <strong>24 hours a day<\/strong> until the water is completely clear.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Monitor your filter pressure and clean or backwash the filter whenever the pressure rises 8\u201310 PSI above its normal operating pressure.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 6: Brush Daily<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Continue brushing the entire pool every day until all visible algae has disappeared.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Consistency is key\u2014mustard algae is persistent and may require several days of treatment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Step 7: Clean Everything That Went Into the Pool<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">One of the biggest reasons mustard algae returns is because it survives on pool equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Be sure to sanitize or soak the following items while the pool is at shock level:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\">Pool toys<\/li>\n\n\n\n<li class=\"\">Floats<\/li>\n\n\n\n<li class=\"\">Brushes<\/li>\n\n\n\n<li class=\"\">Vacuum heads<\/li>\n\n\n\n<li class=\"\">Vacuum hoses<\/li>\n\n\n\n<li class=\"\">Telescopic poles<\/li>\n\n\n\n<li class=\"\">Ladders (if removable)<\/li>\n\n\n\n<li class=\"\">Swimsuits<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Failing to clean these items can reintroduce algae back into the water.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Preventing Mustard Algae from Returning<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The best defense against mustard algae is consistent pool maintenance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To keep your pool clean:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\">Maintain proper free chlorine levels.<\/li>\n\n\n\n<li class=\"\">Test your water regularly.<\/li>\n\n\n\n<li class=\"\">Brush the pool weekly.<\/li>\n\n\n\n<li class=\"\">Clean your filter as needed.<\/li>\n\n\n\n<li class=\"\">Keep water circulating daily.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;re already using <strong>ProTeam Supreme<\/strong> or <strong>ProTeam Supreme PLUS<\/strong>, maintaining <strong>30\u201350 ppm borates<\/strong> can help improve water quality and support sanitizer performance, making it more difficult for algae to establish itself.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Need Help?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Mustard algae can be difficult to eliminate without the proper treatment and equipment. If you&#8217;re struggling with recurring algae or want professional water care, <strong>L&amp;J Pools<\/strong> is here to help.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Our experienced technicians provide professional pool maintenance, water testing, algae treatment, equipment repairs, liner replacements, and complete pool renovations throughout <strong>Bethel, CT, and the surrounding communities<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Contact L&amp;J Pools today<\/strong> to schedule professional pool service and get your backyard back to crystal-clear condition.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This post is optimized for search terms such as <strong>&#8220;how to get rid of mustard algae,&#8221; &#8220;mustard algae treatment,&#8221; &#8220;yellow algae in pool,&#8221;<\/strong> and <strong>&#8220;ProTeam pool chemicals,&#8221;<\/strong> making it a strong addition to your website&#8217;s blog.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to Get Rid of Mustard Algae in Your Swimming Pool If you&#8217;ve noticed yellow or mustard-colored patches clinging to the walls or floor of your pool, you&#8217;re likely dealing with mustard algae. Unlike green algae, mustard algae is extremely stubborn and can quickly return if it&#8217;s not treated properly. It thrives in shaded areas, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":35365,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-35347","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"How to Get Rid of Mustard Algae in Your Swimming Pool If you&#039;ve noticed yellow or mustard-colored patches clinging to the walls or floor of your pool, you&#039;re likely dealing with mustard algae. 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Unlike green algae, mustard algae is extremely stubborn and can quickly return if it's not treated properly. 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20:12:14","updated":"2026-07-10 20:32:09","seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.ljpools.com\/home\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.ljpools.com\/home\/category\/uncategorized\/\" title=\"Uncategorized\">Uncategorized<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tHow to Get Rid of Mustard Algae in Your Swimming Pool\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/www.ljpools.com\/home"},{"label":"Uncategorized","link":"https:\/\/www.ljpools.com\/home\/category\/uncategorized\/"},{"label":"How to Get Rid of Mustard Algae in Your Swimming 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to Get Rid of Mustard Algae in Your Swimming Pool If you&#8217;ve noticed yellow or mustard-colored patches clinging to the walls or floor of your pool, you&#8217;re likely dealing with mustard algae. Unlike green algae, mustard algae is extremely stubborn and can quickly return if it&#8217;s not treated properly. 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