{"id":4533,"date":"2026-09-04T13:05:21","date_gmt":"2026-09-04T13:05:21","guid":{"rendered":"https:\/\/poolchemicalcalculator.com\/news\/how-much-algaecide-to-add-to-pool\/"},"modified":"2026-09-04T13:05:21","modified_gmt":"2026-09-04T13:05:21","slug":"how-much-algaecide-to-add-to-pool","status":"publish","type":"post","link":"https:\/\/poolchemicalcalculator.com\/news\/how-much-algaecide-to-add-to-pool\/","title":{"rendered":"How Much Algaecide to Add to Your Pool: The Complete Dosage Guide"},"content":{"rendered":"<p>That green tint creeping along your pool walls? It&#8217;s algae, and it&#8217;s about to ruin your weekend. Knowing <strong>how much algaecide to add to your pool<\/strong> can mean the difference between crystal-clear water and a swampy mess that takes days to fix. But here&#8217;s the thing: algaecide dosing isn&#8217;t one-size-fits-all. The amount you need depends on your pool size, the type of algaecide you&#8217;re using, and whether the job is prevention or an active bloom.<\/p>\n<!-- PCC AI SUMMARY START -->\n<section class=\"pcc-answer-card\" data-ai-summary=\"true\">\n  <h2>Quick answer<\/h2>\n  <p>How Much Algaecide to Add to Your Pool: The Complete Dosage Guide: That green tint creeping along your pool walls? It&#x27;s algae, and it&#x27;s about to ruin your weekend. Knowing how much algaecide to add to your pool can mean the difference between crystal-clear water and a swampy mess that.<\/p>\n<\/section>\n<!-- PCC AI SUMMARY END -->\n<p>I&#8217;ve seen pool owners dump half a bottle &#8220;just to be safe&#8221; and end up with foam covering their entire pool. Others add a tiny splash and wonder why the algae keeps coming back. Neither approach works. Let&#8217;s get your dosage right the first time.<\/p>\n\n<h2>Quick Answer<\/h2>\n\n<p>For most pools, add <strong>2-4 oz of algaecide per 10,000 gallons for weekly prevention<\/strong> or <strong>4-8 oz per 10,000 gallons for an active algae treatment<\/strong>, depending on the product strength. Polyquat 60 usually needs the smallest dose, polyquat 30 needs about double, quat algaecide is cheap but can foam, and copper algaecide works on stubborn algae but must be measured carefully to avoid stains.<\/p>\n\n<p>If you do not know your pool size, run the <a href=\"https:\/\/poolchemicalcalculator.com\/volume\">pool volume calculator<\/a> before dosing. If you are treating visible algae, shock first, use the <a href=\"https:\/\/poolchemicalcalculator.com\/chlorine\">chlorine calculator<\/a> to reach the right free chlorine level, then add algaecide after chlorine drops below 5 ppm.<\/p>\n\n<h2>What We Analyzed: Algaecide Dosage Comparison Table<\/h2>\n\n<p>To help you nail the correct amount, I calculated dosages across the most common algaecide types and concentrations. This table covers both preventative maintenance and initial treatment doses for a range of pool sizes.<\/p>\n\n<h3>Dosage Calculation Methodology<\/h3>\n\n<p>I based these calculations on standard dosage rates from EPA-registered product labels and industry averages:<\/p>\n\n<ul>\n<li><strong>Polyquat 60%<\/strong>: 2 oz per 10,000 gallons (maintenance), 4 oz per 10,000 gallons (initial treatment)<\/li>\n<li><strong>Polyquat 30%<\/strong>: 4 oz per 10,000 gallons (maintenance), 8 oz per 10,000 gallons (initial treatment)<\/li>\n<li><strong>Copper-based 7.1%<\/strong>: 2 oz per 10,000 gallons (maintenance), 4 oz per 10,000 gallons (initial treatment)<\/li>\n<li><strong>Quat 10%<\/strong>: 3 oz per 10,000 gallons (maintenance), 6 oz per 10,000 gallons (initial treatment)<\/li>\n<\/ul>\n\n<p>| Pool Volume | Algaecide Type | Maintenance Dose | Initial Treatment Dose | Notes |<\/p>\n<p>|&#8212;&#8212;&#8212;&#8212;-|&#8212;&#8212;&#8212;&#8212;&#8212;-|&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;|&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;|&#8212;&#8212;-|<\/p>\n<p>| 10,000 gal | Polyquat 60% | 2 oz (59 mL) | 4 oz (118 mL) | Non-foaming, safe for all pool types |<\/p>\n<p>| 10,000 gal | Polyquat 30% | 4 oz (118 mL) | 8 oz (237 mL) | Non-foaming, requires double the 60% dose |<\/p>\n<p>| 10,000 gal | Copper 7.1% | 2 oz (59 mL) | 4 oz (118 mL) | Risk of staining if overdosed |<\/p>\n<p>| 10,000 gal | Quat 10% | 3 oz (89 mL) | 6 oz (177 mL) | May cause foaming, most affordable |<\/p>\n<p>| 15,000 gal | Polyquat 60% | 3 oz (89 mL) | 6 oz (177 mL) | Non-foaming, safe for all pool types |<\/p>\n<p>| 15,000 gal | Polyquat 30% | 6 oz (177 mL) | 12 oz (355 mL) | Non-foaming, requires double the 60% dose |<\/p>\n<p>| 15,000 gal | Copper 7.1% | 3 oz (89 mL) | 6 oz (177 mL) | Risk of staining if overdosed |<\/p>\n<p>| 15,000 gal | Quat 10% | 4.5 oz (133 mL) | 9 oz (266 mL) | May cause foaming, most affordable |<\/p>\n<p>| 20,000 gal | Polyquat 60% | 4 oz (118 mL) | 8 oz (237 mL) | Non-foaming, safe for all pool types |<\/p>\n<p>| 20,000 gal | Polyquat 30% | 8 oz (237 mL) | 16 oz (473 mL) | Non-foaming, requires double the 60% dose |<\/p>\n<p>| 20,000 gal | Copper 7.1% | 4 oz (118 mL) | 8 oz (237 mL) | Risk of staining if overdosed |<\/p>\n<p>| 20,000 gal | Quat 10% | 6 oz (177 mL) | 12 oz (355 mL) | May cause foaming, most affordable |<\/p>\n<p>| 25,000 gal | Polyquat 60% | 5 oz (148 mL) | 10 oz (296 mL) | Non-foaming, safe for all pool types |<\/p>\n<p>| 25,000 gal | Copper 7.1% | 5 oz (148 mL) | 10 oz (296 mL) | Risk of staining if overdosed |<\/p>\n\n<p><strong>Limitations<\/strong>: These dosages represent typical product averages. Your specific algaecide brand may have different concentrations or recommendations. Always check your product label first\u2014it overrides any general guide, including this one.<\/p>\n\n<h2>How to Calculate Your Pool Volume<\/h2>\n\n<p>You can&#8217;t dose correctly if you don&#8217;t know how many gallons you&#8217;re treating. For the fastest answer, use the <a href=\"https:\/\/poolchemicalcalculator.com\/volume\">Pool Chemical Calculator volume tool<\/a>. Here&#8217;s the quick math:<\/p>\n\n<h3>Rectangular Pools<\/h3>\n<p><strong>Length \u00d7 Width \u00d7 Average Depth \u00d7 7.5 = Gallons<\/strong><\/p>\n\n<p>Example: 32 ft \u00d7 16 ft \u00d7 5 ft \u00d7 7.5 = 19,200 gallons<\/p>\n\n<h3>Round Pools<\/h3>\n<p><strong>Diameter \u00d7 Diameter \u00d7 Average Depth \u00d7 5.9 = Gallons<\/strong><\/p>\n\n<p>Example: 18 ft \u00d7 18 ft \u00d7 4 ft \u00d7 5.9 = 7,646 gallons<\/p>\n\n<h3>Oval Pools<\/h3>\n<p><strong>Long Diameter \u00d7 Short Diameter \u00d7 Average Depth \u00d7 5.9 = Gallons<\/strong><\/p>\n\n<p>Example: 24 ft \u00d7 12 ft \u00d7 4 ft \u00d7 5.9 = 6,797 gallons<\/p>\n\n<p>Write your pool volume down somewhere. You&#8217;ll reference it constantly throughout pool season.<\/p>\n\n<h2>Understanding Algaecide Types and Why Concentration Matters<\/h2>\n\n<p>Not all algaecides work the same way. And the percentage on your bottle? It directly affects how much you need to pour.<\/p>\n\n<h3>Polyquat Algaecides (The Premium Choice)<\/h3>\n\n<p>Polyquat algaecides come in different concentrations\u2014typically 30% and 60%. Here&#8217;s where pool owners get confused: a 30% polyquat requires twice the amount of a 60% polyquat to achieve the same result.<\/p>\n\n<p>Think of it like mixing lemonade concentrate. If one brand is half as strong, you need to use twice as much to get the same flavor.<\/p>\n\n<p><strong>Best for<\/strong>: All algae types, vinyl liner pools, and pools with attached spas (won&#8217;t foam)<\/p>\n\n<p>A solid polyquat option is the <a href=\"https:\/\/www.amazon.com\/dp\/B084GX35NZ?tag=poolcalc04-20\">Clorox Pool&#038;Spa Green Algae Eliminator<\/a>, which works well for routine maintenance and moderate algae problems.<\/p>\n\n<h3>Quat Algaecides (The Budget Option)<\/h3>\n\n<p>Quaternary ammonium compounds (quats) cost less but come with a trade-off: they foam. Add too much, and your pool looks like a bubble bath. They also become less effective when chlorine levels are high.<\/p>\n\n<p><strong>Best for<\/strong>: Budget-conscious maintenance, pools without water features<\/p>\n\n<h3>Copper-Based Algaecides (The Heavy Hitters)<\/h3>\n\n<p>Copper algaecides excel at killing stubborn algae\u2014especially black algae and yellow (mustard) algae. But they demand respect. Overdose copper, and you risk blue-green staining on your pool surfaces and blonde hair turning green.<\/p>\n\n<p><strong>Best for<\/strong>: Black algae, yellow algae, severe infestations<\/p>\n\n<p>For tough algae situations, <a href=\"https:\/\/www.amazon.com\/dp\/B004XNKQTU?tag=poolcalc04-20\">PoolRx Algaecide Unit<\/a> offers a controlled copper release that minimizes staining risk.<\/p>\n\n<h2>Preventative vs. Treatment Dosing: The Critical Difference<\/h2>\n\n<p>Here&#8217;s a mistake I see constantly: pool owners using maintenance doses when they have an active algae bloom. That&#8217;s like putting a band-aid on a broken arm.<\/p>\n\n<h3>Maintenance Dosing (Weekly Prevention)<\/h3>\n\n<p>When your pool is clear and algae-free, you&#8217;re in maintenance mode. Add algaecide weekly\u2014typically after your regular chlorine shock has dissipated (wait at least 24 hours after shocking).<\/p>\n\n<p><strong>Typical maintenance dose<\/strong>: 2-4 oz per 10,000 gallons, depending on product concentration<\/p>\n\n<h3>Initial\/Shock Dosing (Fighting Active Algae)<\/h3>\n\n<p>See visible algae? You need the initial treatment dose, which is typically double the maintenance amount. But here&#8217;s the catch: algaecide alone won&#8217;t kill an active bloom. Chlorine does the killing. Algaecide prevents regrowth and weakens the algae cell walls so chlorine can work faster.<\/p>\n\n<p><strong>Typical treatment dose<\/strong>: 4-8 oz per 10,000 gallons, depending on product concentration<\/p>\n\n<h3>The Right Sequence for an Algae Attack<\/h3>\n\n<h3>Step 1: Brush all pool surfaces<\/h3>\n\n<p>Brush walls, floors, steps, ladders, corners, and shady areas to break up algae colonies. Algaecide and chlorine work much better after the protective algae film is disturbed.<\/p>\n\n<h3>Step 2: Shock with chlorine<\/h3>\n\n<p>Use enough chlorine to bring free chlorine to 10-20 ppm for green algae, or 20-30 ppm for yellow or black algae. The <a href=\"https:\/\/poolchemicalcalculator.com\/chlorine\">chlorine calculator<\/a> can help you calculate the exact amount for your pool volume.<\/p>\n\n<h3>Step 3: Wait while chlorine does the killing<\/h3>\n\n<p>Run the pump and give chlorine 24-48 hours to oxidize the algae. Keep swimmers out while chlorine is above the safe range listed on your test kit or product label.<\/p>\n\n<h3>Step 4: Test chlorine before adding algaecide<\/h3>\n\n<p>Once free chlorine drops below 5 ppm, add your initial treatment dose of algaecide. If pH is outside 7.2-7.6, correct it with the <a href=\"https:\/\/poolchemicalcalculator.com\/ph\">pH calculator<\/a> before the next treatment.<\/p>\n\n<h3>Step 5: Run the filter continuously<\/h3>\n\n<p>Run the filter 24\/7 until the water clears. Dead algae turns into fine debris, so filtration time matters as much as chemical dose.<\/p>\n\n<h3>Step 6: Backwash or clean the filter<\/h3>\n\n<p>Backwash a sand or DE filter when pressure rises 20-25% over clean pressure. For cartridge filters, rinse the cartridge thoroughly. If alkalinity is out of range, use the <a href=\"https:\/\/poolchemicalcalculator.com\/alkalinity\">alkalinity calculator<\/a> after the algae cleanup so pH does not keep drifting.<\/p>\n\n<p>Adding algaecide while chlorine is still high wastes your money. The chlorine oxidizes the algaecide before it can work.<\/p>\n\n<h2>Common Dosing Mistakes (And How to Avoid Them)<\/h2>\n\n<h3>Mistake #1: Ignoring Product Concentration<\/h3>\n\n<p>That 30% polyquat from the pool store requires twice the dose of the 60% version. Miss this detail, and you&#8217;re under-dosing.<\/p>\n\n<p><strong>Fix<\/strong>: Always check the active ingredient percentage. Adjust your dose accordingly.<\/p>\n\n<h3>Mistake #2: Overdosing &#8220;Just to Be Safe&#8221;<\/h3>\n\n<p>More isn&#8217;t better. Too much quat algaecide creates a foam party. Too much copper causes staining that&#8217;s expensive to remove. And any overdose wastes money.<\/p>\n\n<p><strong>Fix<\/strong>: Measure precisely. Use a measuring cup, not the cap (which is rarely accurate).<\/p>\n\n<h3>Mistake #3: Adding Algaecide With Shock<\/h3>\n\n<p>Chlorine and algaecide shouldn&#8217;t be added simultaneously. High chlorine levels break down most algaecides, rendering them useless.<\/p>\n\n<p><strong>Fix<\/strong>: Shock first. Wait 24-48 hours for chlorine to drop below 5 ppm. Then add algaecide.<\/p>\n\n<h3>Mistake #4: Using Algaecide as Your Primary Treatment<\/h3>\n\n<p>Algaecide prevents algae. Chlorine kills algae. Using algaecide alone on a green pool is like using deodorant instead of showering\u2014it doesn&#8217;t fix the underlying problem.<\/p>\n\n<p><strong>Fix<\/strong>: Shock with chlorine first. Use algaecide as backup.<\/p>\n\n<h2>Seasonal Cost Comparison: Which Algaecide Type Saves Money?<\/h2>\n\n<p>Pool season runs roughly 20 weeks in most areas. Here&#8217;s what you&#8217;d spend on weekly maintenance dosing for a 15,000-gallon pool:<\/p>\n\n<p>| Algaecide Type | Weekly Dose | Cost Per Dose (Approx.) | Season Total |<\/p>\n<p>|&#8212;&#8212;&#8212;&#8212;&#8212;-|&#8212;&#8212;&#8212;&#8212;-|&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;|&#8212;&#8212;&#8212;&#8212;&#8211;|<\/p>\n<p>| Quat 10% | 4.5 oz | $1.50 | $30 |<\/p>\n<p>| Polyquat 30% | 6 oz | $3.00 | $60 |<\/p>\n<p>| Polyquat 60% | 3 oz | $2.25 | $45 |<\/p>\n<p>| Copper 7.1% | 3 oz | $2.00 | $40 |<\/p>\n\n<p>Quat algaecides cost less per bottle, but factor in the foaming hassle and reduced effectiveness around water features. Polyquat 60% offers the best balance of cost and convenience\u2014you use less product per dose.<\/p>\n\n<h2>When Algaecide Isn&#8217;t Working: Troubleshooting Guide<\/h2>\n\n<p>Dumped algaecide in your pool but algae keeps coming back? Here&#8217;s what to check:<\/p>\n\n<h3>Check Your Chlorine Levels First<\/h3>\n\n<p>If free chlorine sits below 1 ppm, algae will regrow faster than algaecide can prevent it. Algaecide supports chlorine\u2014it doesn&#8217;t replace it.<\/p>\n\n<p><strong>Target<\/strong>: Keep free chlorine between 2-4 ppm during algae-prone summer months.<\/p>\n\n<h3>Test Your CYA (Cyanuric Acid)<\/h3>\n\n<p>High cyanuric acid levels (above 50 ppm) reduce chlorine&#8217;s effectiveness. Your chlorine might read &#8220;normal&#8221; but actually be too weak to kill algae.<\/p>\n\n<p><strong>Target<\/strong>: Keep CYA between 30-50 ppm for proper chlorine activity.<\/p>\n\n<h3>Examine Your Phosphate Levels<\/h3>\n\n<p>Phosphates feed algae. If your phosphate levels exceed 500 ppb, algae has a constant food source that makes prevention nearly impossible.<\/p>\n\n<p><strong>Fix<\/strong>: Use a phosphate remover before relying on algaecide.<\/p>\n\n<h3>Consider Water Circulation Dead Spots<\/h3>\n\n<p>Algae loves still water. Areas behind ladders, in corners, or near steps often have poor circulation\u2014and that&#8217;s where algae blooms start.<\/p>\n\n<p><strong>Fix<\/strong>: Adjust return jets to eliminate dead zones. Brush these areas more frequently.<\/p>\n\n<h3>You Might Need a Different Algaecide Type<\/h3>\n\n<p>Green algae responds to most algaecides. Yellow and black algae? Not so much. They often require copper-based products or specialty formulas like <a href=\"https:\/\/www.amazon.com\/dp\/B00PZZFGLY?tag=poolcalc04-20\">Yellow Treat Algaecide<\/a>.<\/p>\n\n<!-- PCC RELATED LINKS START -->\n<section class=\"pcc-related-guides\">\n  <h2>Related pool calculators and guides<\/h2>\n  <ul>\n    <li><a href=\"https:\/\/poolchemicalcalculator.com\/volume\">Pool volume calculator<\/a><\/li> <li><a href=\"https:\/\/poolchemicalcalculator.com\/chlorine\">Free chlorine calculator<\/a><\/li> <li><a href=\"https:\/\/poolchemicalcalculator.com\/ph\">pH calculator<\/a><\/li> <li><a href=\"https:\/\/poolchemicalcalculator.com\/alkalinity\">Alkalinity calculator<\/a><\/li> <li><a href=\"https:\/\/poolchemicalcalculator.com\/forecast\">Pool chemical forecast<\/a><\/li> <li><a href=\"https:\/\/poolchemicalcalculator.com\/news\">Pool maintenance blog<\/a><\/li>\n  <\/ul>\n<\/section>\n<!-- PCC RELATED LINKS END -->\n<h2>FAQ<\/h2>\n\n<h3>Can I add algaecide and chlorine at the same time?<\/h3>\n\n<p>No. High chlorine levels break down algaecide before it can work. Shock your pool first, then wait 24-48 hours until chlorine drops below 5 ppm before adding algaecide.<\/p>\n\n<h3>What happens if I add too much algaecide?<\/h3>\n\n<p>It depends on the type. Quat algaecides cause persistent foaming. Copper-based products can stain pool surfaces and turn blonde hair green. Polyquats are more forgiving but still wasteful in excess. If you overdose, run your filter continuously and wait\u2014the excess will dissipate over several days.<\/p>\n\n<h3>How often should I add algaecide to my pool?<\/h3>\n\n<p>For maintenance, add algaecide weekly during swim season. If you live in a hot, humid climate or your pool gets heavy sun exposure, weekly dosing is especially important. Some pool owners in dry climates with good chlorine levels can extend to every two weeks.<\/p>\n\n<h3>Why does my algaecide bottle recommend different amounts than this guide?<\/h3>\n\n<p>Product concentrations vary significantly between brands. A &#8220;30% polyquat&#8221; from one manufacturer might have slightly different formulations than another. Always follow your specific product&#8217;s label\u2014it&#8217;s based on that exact formula&#8217;s testing and EPA registration.<\/p>\n\n<h3>Can I swim after adding algaecide?<\/h3>\n\n<p>Most algaecides are safe for swimming once dispersed\u2014typically 15-30 minutes after application with the pump running. However, check your product label. Some copper-based algaecides recommend waiting longer, especially at higher doses.<\/p>\n\n<h2>Take Control of Your Pool Chemistry<\/h2>\n\n<p>Guessing at chemical doses wastes time and money. Get precise calculations for algaecide, chlorine, pH adjusters, and every other pool chemical in the <a href=\"https:\/\/poolchemicalcalculator.com\/app\">Pool Chemical Calculator app<\/a>. Enter your pool volume once, and you&#8217;ll always know exactly how much to add.<\/p>\n\n<h2>Sources<\/h2>\n\n<ul>\n<li><a href=\"https:\/\/www.intheswim.com\/blog\/pool-chemicals-how-much-of-what-is-needed.html\">Pool Chemicals: How Much Of What Is Needed<\/a> &#8211; In The Swim&#8217;s comprehensive pool chemical dosing guide<\/li>\n<li><a href=\"https:\/\/simplifiedpools.com\/blog\/pool-algaecide-guide-types\/\">Pool Algaecide Guide: Types and Applications<\/a> &#8211; Detailed breakdown of algaecide categories and their uses<\/li>\n<li><a href=\"https:\/\/www.calculatedhome.com\/pool\/algaecide-dosing\">Algaecide Dosing Calculator<\/a> &#8211; Reference calculations for various algaecide types<\/li>\n<\/ul>\n\n<!-- PCC AFFILIATE PRODUCTS START -->\n<section class=\"pcc-affiliate-products\"><style>.pcc-affiliate-products{background:#f0f8ff;border:1px solid #d0e8f0;border-radius:12px;padding:20px;margin:30px 0}.pcc-affiliate-heading{display:flex;justify-content:space-between;gap:18px;align-items:end;margin-bottom:14px}.pcc-affiliate-heading h2{margin:0}.pcc-affiliate-heading p{max-width:360px;color:#557;font-size:.86rem;line-height:1.45;margin:0}.pcc-affiliate-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.pcc-affiliate-card{display:grid;grid-template-rows:auto 1fr;text-decoration:none;color:inherit;background:#fff;border:1px solid #d0e8f0;border-radius:10px;overflow:hidden;min-width:0}.pcc-affiliate-card img{width:100%;height:140px;object-fit:contain;background:#fff;padding:10px;border-bottom:1px solid #e2f0f6}.pcc-affiliate-card div{padding:12px}.pcc-affiliate-card span{display:block;color:#0576a8;font-weight:800;font-size:.78rem;margin-bottom:5px}.pcc-affiliate-card strong{display:block;color:#123;font-size:.94rem;line-height:1.25}.pcc-affiliate-card p{color:#456;font-size:.82rem;line-height:1.38;margin:8px 0}.pcc-affiliate-card em{color:#0576a8;font-style:normal;font-weight:800;font-size:.82rem}@media(max-width:780px){.pcc-affiliate-heading{display:block}.pcc-affiliate-heading p{max-width:none;margin-top:6px}.pcc-affiliate-grid{grid-template-columns:1fr}.pcc-affiliate-card{grid-template-columns:112px 1fr;grid-template-rows:auto}.pcc-affiliate-card img{height:100%;min-height:124px;border-bottom:0;border-right:1px solid #e2f0f6}}<\/style><div class=\"pcc-affiliate-heading\"><h2>Recommended pool supplies<\/h2><p>As an Amazon Associate, Pool Chemical Calculator earns from qualifying purchases.<\/p><\/div><div class=\"pcc-affiliate-grid\"><a class=\"pcc-affiliate-card\" href=\"https:\/\/www.amazon.com\/dp\/B0017SW5E8?tag=poolcalc04-20&amp;linkCode=osi&amp;th=1&amp;psc=1\" target=\"_blank\" rel=\"sponsored nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/m.media-amazon.com\/images\/I\/31Mg+NQbYTL._SL160_.jpg\" alt=\"Pool brush\" loading=\"lazy\"><div><span>Pool brush<\/span><strong>Poolmaster 18-Inch Stainless Steel Pool Algae Brush, Heavy-Duty Aluminum Back, for&#8230;<\/strong><p>Brushing breaks up algae films, dead spots, and wall buildup so chemicals and filtration work.<\/p><em>View on Amazon<\/em><\/div><\/a><a class=\"pcc-affiliate-card\" href=\"https:\/\/www.amazon.com\/dp\/B003V4YZEO?tag=poolcalc04-20&amp;linkCode=osi&amp;th=1&amp;psc=1\" target=\"_blank\" rel=\"sponsored nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/m.media-amazon.com\/images\/I\/41h-LFNvhPL._SL160_.jpg\" alt=\"Pool test kit\" loading=\"lazy\"><div><span>Pool test kit<\/span><strong>Taylor K-1515-A Drop Test Kit Fas-Dpd Pool Chlorine .75 Ounces 1 Drop = .2 Or .5&#8230;<\/strong><p>Accurate readings make every chlorine, pH, alkalinity, calcium, and CYA dose safer.<\/p><em>View on Amazon<\/em><\/div><\/a><a class=\"pcc-affiliate-card\" href=\"https:\/\/www.amazon.com\/dp\/B00PZZFLHW?tag=poolcalc04-20&amp;linkCode=osi&amp;th=1&amp;psc=1\" target=\"_blank\" rel=\"sponsored nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/m.media-amazon.com\/images\/I\/41jVfMz1dPL._SL160_.jpg\" alt=\"Pool algaecide\" loading=\"lazy\"><div><span>Pool algaecide<\/span><strong>Clorox\u00ae Pool&amp;Spa\u2122 Swimming Pool Algaecide, Prevents and Treats Pool Algae,&#8230;<\/strong><p>Helps prevent algae from returning after brushing, shocking, and correcting circulation.<\/p><em>View on Amazon<\/em><\/div><\/a><\/div><\/section>\n<!-- PCC AFFILIATE PRODUCTS END -->\n\n<!-- PCC APP CTA START -->\n<section class=\"pcc-app-cta\" data-pcc-app-cta=\"true\">\n  <h2>Get exact pool chemical doses<\/h2>\n  <p>Pool Chemical Calculator turns your test readings, pool volume, and target levels into exact treatment amounts for chlorine, pH, alkalinity, calcium, stabilizer, salt, and more.<\/p>\n  <p><a href=\"https:\/\/poolchemicalcalculator.com\/app\"><strong>Open the Pool Chemical Calculator app<\/strong><\/a> for iOS, Android, or web.<\/p>\n<\/section>\n<!-- PCC APP CTA END -->\n<!-- PCC AI SEO STRUCTURED DATA START -->\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\/\/poolchemicalcalculator.com\/news\/how-much-algaecide-to-add-to-pool\/#article\",\"headline\":\"How Much Algaecide to Add to Your Pool: The Complete Dosage Guide\",\"description\":\"That green tint creeping along your pool walls? It's algae, and it's about to ruin your weekend. 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