{"id":10,"date":"2026-06-26T23:19:49","date_gmt":"2026-06-26T15:19:49","guid":{"rendered":"https:\/\/sdic-tcca.hbkaixuan.cn\/?p=10"},"modified":"2026-06-26T23:19:49","modified_gmt":"2026-06-26T15:19:49","slug":"how-to-calculate-sdic-and-tcca-dosage-for-swimming-pools-a-complete-guide-for-2026","status":"publish","type":"post","link":"https:\/\/sdic-tcca.hbkaixuan.cn\/?p=10","title":{"rendered":"How to Calculate SDIC and TCCA Dosage for Swimming Pools: A Complete Guide for 2026"},"content":{"rendered":"<p><strong>Quick answer:<\/strong> For routine pool maintenance, dose <strong>2 grams of TCCA 90% per cubic meter of water<\/strong> (or <strong>3.3 grams of SDIC 60%<\/strong>) to maintain a free chlorine residual of 1\u20133 ppm. For shock treatment after heavy use, multiply by 5x. Always test water before dosing.<\/p>\n<p>Calculating the correct dose of chlorine donor is the single most important skill for pool operators, hotel maintenance managers, and water-treatment distributors. This guide provides the exact formulas used by <strong>Shilan Chemical<\/strong>&#8216;s technical team to advise customers across 50+ countries.<\/p>\n<h2>Why Dosage Calculation Matters<\/h2>\n<p>Under-dosing leads to bacterial growth, algae blooms, and cloudy water. Over-dosing wastes money, irritates swimmers&#8217; skin and eyes, and violates health codes in most jurisdictions. Getting the dose right saves an average pool operator <strong>30\u201340% on annual chemical costs<\/strong> while ensuring compliance.<\/p>\n<h2>The Core Dosage Formula<\/h2>\n<p>The fundamental equation for chlorine dosing is:<\/p>\n<blockquote><p>\n<strong>Chemical Dose (grams) = Pool Volume (m\u00b3) \u00d7 Target Chlorine (ppm) \u00f7 Available Chlorine (%)<\/strong>\n<\/p><\/blockquote>\n<p>For example, a 50 m\u00b3 pool needing 2 ppm free chlorine using TCCA 90%:<br \/>\n<code>50 \u00d7 2 \u00f7 90 \u00d7 100 \u00f7 1000 = 0.111 kg = 111 grams of TCCA<\/code><\/p>\n<h3>Step 1: Measure Your Pool Volume<\/h3>\n<p>For rectangular pools: <strong>Length \u00d7 Width \u00d7 Average Depth \u00d7 1000 = Liters<\/strong> (divide by 1000 for m\u00b3).<\/p>\n<p>For circular pools: <strong>\u03c0 \u00d7 Radius\u00b2 \u00d7 Average Depth \u00d7 1000 = Liters<\/strong>.<\/p>\n<h3>Step 2: Choose Your Target Chlorine Level<\/h3>\n<ul>\n<li><strong>Daily maintenance:<\/strong> 1\u20133 ppm free chlorine<\/li>\n<li><strong>Heavy bather load:<\/strong> 3\u20135 ppm<\/li>\n<li><strong>Shock treatment (after rain, algae, contamination):<\/strong> 10 ppm<\/li>\n<li><strong>Hot tubs \/ spas:<\/strong> 3\u20135 ppm (higher water temperature = faster chlorine consumption)<\/li>\n<\/ul>\n<h2>Ready-to-Use Dosing Table for SDIC 60% and TCCA 90%<\/h2>\n<table>\n<thead>\n<tr>\n<th>Pool Volume<\/th>\n<th>SDIC 60% Daily Dose<\/th>\n<th>TCCA 90% Daily Dose<\/th>\n<th>Shock Treatment (TCCA)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>20 m\u00b3 (small residential)<\/td>\n<td>67 g<\/td>\n<td>44 g<\/td>\n<td>222 g<\/td>\n<\/tr>\n<tr>\n<td>50 m\u00b3 (medium residential)<\/td>\n<td>167 g<\/td>\n<td>111 g<\/td>\n<td>556 g<\/td>\n<\/tr>\n<tr>\n<td>100 m\u00b3 (large residential)<\/td>\n<td>333 g<\/td>\n<td>222 g<\/td>\n<td>1.11 kg<\/td>\n<\/tr>\n<tr>\n<td>500 m\u00b3 (commercial)<\/td>\n<td>1.67 kg<\/td>\n<td>1.11 kg<\/td>\n<td>5.56 kg<\/td>\n<\/tr>\n<tr>\n<td>1000 m\u00b3 (Olympic-class)<\/td>\n<td>3.33 kg<\/td>\n<td>2.22 kg<\/td>\n<td>11.1 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>SDIC vs TCCA: Which to Choose for Your Pool?<\/h2>\n<p>Both products work, but each fits a different operational style:<\/p>\n<ul>\n<li><strong>Choose TCCA 90%<\/strong> if you have a tablet feeder or floating dispenser and want unattended slow release (perfect for outdoor pools, vacation rentals)<\/li>\n<li><strong>Choose SDIC 60%<\/strong> if you do manual dosing daily and need fast, neutral-pH dissolution (perfect for indoor pools, public pools requiring quick adjustments)<\/li>\n<\/ul>\n<p>For more detailed product specs, see our <a href=\"https:\/\/sdic-tcca.hbkaixuan.cn\/products.html\">complete product catalog<\/a>.<\/p>\n<h2>Common Dosing Mistakes to Avoid<\/h2>\n<h3>Mistake 1: Ignoring Cyanuric Acid (CYA) Levels<\/h3>\n<p>When CYA exceeds 50 ppm, free chlorine becomes &#8220;locked&#8221; and ineffective even at high doses. Test CYA monthly and partially drain if it exceeds 80 ppm.<\/p>\n<h3>Mistake 2: Mixing SDIC and TCCA Directly<\/h3>\n<p>Never mix the dry products. Dose them at different times of the day, ideally with at least 4 hours apart, to prevent dangerous chlorine gas release.<\/p>\n<h3>Mistake 3: Dosing in Direct Sunlight Without CYA<\/h3>\n<p>Without stabilizer, up to 95% of free chlorine evaporates within 2 hours under summer sun. Use TCCA (which contains built-in CYA) for outdoor pools.<\/p>\n<h2>FAQ<\/h2>\n<h3>How often should I add SDIC or TCCA?<\/h3>\n<p>SDIC: daily for manual dosing pools. TCCA: every 5\u20137 days using slow-release tablets in a dispenser.<\/p>\n<h3>What&#8217;s the difference between 56% and 60% SDIC?<\/h3>\n<p>SDIC 60% contains less filler and is cheaper to ship per unit of active chlorine. SDIC 56% is more widely available globally. For B2B bulk purchasing, 60% offers better freight economics.<\/p>\n<h3>Can I use TCCA in a salt-water pool?<\/h3>\n<p>Yes, but salt-chlorinator systems already produce chlorine via electrolysis. Use TCCA only for shock treatment or when the salt cell is undersized.<\/p>\n<h2>Need Bulk Pricing or Custom OEM?<\/h2>\n<p>Shilan Chemical supplies SDIC 56%\/60% and TCCA 90% to distributors worldwide, with full SGS-tested COA documentation. <a href=\"https:\/\/sdic-tcca.hbkaixuan.cn\/contact.html\">Contact our technical team<\/a> for a customized quote based on your market and packaging requirements.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn the exact formulas to calculate Sodium Dichloroisocyanurate (SDIC) and Trichloroisocyanuric Acid (TCCA) dosage for any swimming pool size. Includes ready-to-use dosing tables, shock treatment instructions, and water chemistry tips.<\/p>\n","protected":false},"author":1,"featured_media":18,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=\/wp\/v2\/posts\/10","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10"}],"version-history":[{"count":0,"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=\/wp\/v2\/posts\/10\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=\/wp\/v2\/media\/18"}],"wp:attachment":[{"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}