{"id":31,"date":"2026-07-11T14:30:00","date_gmt":"2026-07-11T06:30:00","guid":{"rendered":"https:\/\/sdic-tcca.hbkaixuan.cn\/?p=31"},"modified":"2026-07-11T14:30:00","modified_gmt":"2026-07-11T06:30:00","slug":"tcca-dissolution-rate-explained","status":"publish","type":"post","link":"https:\/\/sdic-tcca.hbkaixuan.cn\/?p=31","title":{"rendered":"TCCA Dissolution Rate Explained: Why Your Pool Chlorine Runs Out in 2 Days Instead of 7"},"content":{"rendered":"<p>You bought TCCA tablets marketed as &#8220;5-7 day slow-release&#8221;, but by the third day your free chlorine is at zero and swimmers are complaining about eye irritation. What went wrong? In 90% of the field complaints we investigate, it&#8217;s not tablet quality \u2014 it&#8217;s the environment.<\/p>\n<h2>1. How TCCA Dissolution Actually Works<\/h2>\n<p>A standard 200g TCCA tablet is a compressed powder disc, 76mm in diameter. When submerged in still water at 25\u00b0C, it dissolves layer by layer at approximately 30-40g per 24 hours. That is where the 5-7 day rating comes from: 200g \u00f7 35g\/day \u2248 5.7 days.<\/p>\n<p>But three variables can multiply the dissolution rate by 3-5\u00d7:<\/p>\n<h2>2. The 7 Root Causes of Fast Dissolution<\/h2>\n<table>\n<thead>\n<tr>\n<th>#<\/th>\n<th>Cause<\/th>\n<th>Effect on Rate<\/th>\n<th>Fix<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>Water temperature &gt; 30\u00b0C<\/td>\n<td>+40%<\/td>\n<td>Reduce tablet count during summer peak<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Strong water circulation (jets, waterfall)<\/td>\n<td>+80%<\/td>\n<td>Move tablet to lower-flow zone<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Chlorinator vs floater<\/td>\n<td>+100%<\/td>\n<td>Use floater for slower dissolution<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>pH too low (&lt; 7.0)<\/td>\n<td>+30%<\/td>\n<td>Adjust with sodium bicarbonate<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>Tablet not fully submerged<\/td>\n<td>+50%<\/td>\n<td>Weight-load the tablet properly<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>Broken\/cracked tablet<\/td>\n<td>+200%<\/td>\n<td>Reject tablets with visible cracks<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>Sub-standard tablet (&lt;85% chlorine)<\/td>\n<td>+30% mass loss<\/td>\n<td>Verify with COA + third-party test<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>3. Real Case: 6-Star Hotel in Dubai (2024)<\/h2>\n<p>A Dubai luxury hotel reported their TCCA tablets from another supplier were &#8220;gone in 3 days&#8221;. Site inspection revealed:<\/p>\n<ul>\n<li>Water temperature: 34\u00b0C (pool heated to compensate for AC-cooled air)<\/li>\n<li>Jet stream directly hitting the chlorinator basket<\/li>\n<li>pH: 6.8 (below recommended)<\/li>\n<li>Tablets had visible surface cracks (poor tablet-press process at supplier)<\/li>\n<\/ul>\n<p>After switching to Shilan Chemical&#8217;s 200g crack-free tablets and moving the floater to a still corner, dissolution time returned to 5.5 days.<\/p>\n<h2>4. How to Test Your Tablet Quality<\/h2>\n<p>Simple field test at your warehouse:<\/p>\n<ol>\n<li>Place one 200g tablet in a mesh bag at the bottom of a 100L still tank at 25\u00b0C<\/li>\n<li>Weigh remaining tablet at 24, 48, 72, 96 hours<\/li>\n<li>Expected residual weight: 165g \/ 130g \/ 95g \/ 60g<\/li>\n<li>If dissolved &gt; 20% faster: reject batch or renegotiate<\/li>\n<\/ol>\n<h2>5. FAQ<\/h2>\n<p><strong>Q: Can I make TCCA dissolve slower by pressing harder?<\/strong><br \/>\nA: No \u2014 over-compression cracks the tablet, causing faster dissolution. Optimal press pressure is 30-40 MPa.<\/p>\n<p><strong>Q: Are 200g tablets always better than 20g tablets?<\/strong><br \/>\nA: For pools &gt; 20 m3 yes; smaller pools should use 20g tablets to avoid overdose and preserve tablet mass.<\/p>\n<p><strong>Q: Should I supplement with cyanuric acid?<\/strong><br \/>\nA: TCCA already contains cyanuric acid stabilizer. Additional CYA is not needed unless CYA level drops below 30 mg\/L.<\/p>\n<h2>Buy TCCA That Actually Lasts 7 Days<\/h2>\n<p>Shilan Chemical presses TCCA tablets at 35 MPa, uses controlled moisture (&lt; 2%), and pass 24\/48\/72h dissolution QC on every batch. <a href=\"https:\/\/sdic-tcca.hbkaixuan.cn\/products.html\">See our TCCA product line \u2192<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>TCCA tablets are advertised as slow-release for 5-7 days, but many pool operators complain about tablets vanishing in 48 hours. Here are the 7 real causes and how to fix each.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=\/wp\/v2\/posts\/31","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=31"}],"version-history":[{"count":0,"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=\/wp\/v2\/posts\/31\/revisions"}],"wp:attachment":[{"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=31"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=31"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sdic-tcca.hbkaixuan.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=31"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}