{"id":652,"date":"2026-05-14T15:14:00","date_gmt":"2026-05-14T13:14:00","guid":{"rendered":"https:\/\/piscinistes-charente-maritime.fr\/blog\/?p=652"},"modified":"2026-05-14T15:14:00","modified_gmt":"2026-05-14T13:14:00","slug":"augmenter-tac-sans-augmenter-ph","status":"publish","type":"post","link":"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/","title":{"rendered":"Comment augmenter le TAC sans augmenter le pH ?"},"content":{"rendered":"<p><strong>Augmenter le TAC sans faire grimper le pH<\/strong>, c&#39;est possible. La cl\u00e9 : du bicarbonate de sodium, des doses fractionn\u00e9es, et de la patience.<\/p>\n<div class=\"entry-content-asset videofit\"><iframe loading=\"lazy\" title=\"\ud83d\udca6 Le TAC, comme le pH, \u00e0 surveiller tr\u00e8s r\u00e9guli\u00e8rement\" width=\"720\" height=\"405\" src=\"https:\/\/www.youtube.com\/embed\/BOif6FddrlI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Sommaire<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#La_reponse_directe_bicarbonate_de_sodium_en_doses_fractionnees\" >La r\u00e9ponse directe : bicarbonate de sodium en doses fractionn\u00e9es<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Le_produit_a_utiliser\" >Le produit \u00e0 utiliser<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Le_dosage_exact\" >Le dosage exact<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Les_etapes_a_suivre\" >Les \u00e9tapes \u00e0 suivre<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Comment_eviter_que_le_pH_monte\" >Comment \u00e9viter que le pH monte ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Tableau_de_correction_rapide\" >Tableau de correction rapide<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Pourquoi_votre_TAC_baisse-t-il\" >Pourquoi votre TAC baisse-t-il ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Entretenir_le_TAC_sur_la_duree\" >Entretenir le TAC sur la dur\u00e9e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Et_maintenant\" >Et maintenant ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#FAQ\" >FAQ<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Comment_augmenter_un_TAC_faible_sans_faire_monter_le_pH_au-dela_de_72_a_74\" >Comment augmenter un TAC faible sans faire monter le pH au-del\u00e0 de 7,2 \u00e0 7,4 ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Comment_baisser_ou_augmenter_le_TAC_dune_piscine\" >Comment baisser ou augmenter le TAC d&rsquo;une piscine ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Comment_augmenter_lalcalinite_dune_piscine_ou_la_baisser\" >Comment augmenter l&rsquo;alcalinit\u00e9 d&rsquo;une piscine ou la baisser ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#Quels_sont_les_symptomes_dun_TAC_trop_bas\" >Quels sont les sympt\u00f4mes d&rsquo;un TAC trop bas ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/piscinistes-charente-maritime.fr\/blog\/augmenter-tac-sans-augmenter-ph\/#TAC_et_pH_quel_ordre_de_correction\" >TAC et pH : quel ordre de correction ?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 id=\"la-r\u00e9ponse-directe--bicarbonate-de-sodium-en-doses-fractionn\u00e9es\"><span class=\"ez-toc-section\" id=\"La_reponse_directe_bicarbonate_de_sodium_en_doses_fractionnees\"><\/span>La r\u00e9ponse directe : bicarbonate de sodium en doses fractionn\u00e9es<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Une seule solution fiable pour <strong>augmenter le TAC piscine<\/strong> sans d\u00e9stabiliser le pH : le bicarbonate de sodium (NaHCO3). Voici comment l&#39;utiliser correctement.<\/p>\n<h3 id=\"le-produit-\u00e0-utiliser\"><span class=\"ez-toc-section\" id=\"Le_produit_a_utiliser\"><\/span>Le produit \u00e0 utiliser<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Le bicarbonate de sodium augmente l&#39;<strong>alcalinit\u00e9 piscine<\/strong> avec un impact pH minimal, soit +0,1 \u00e0 +0,2 par ajout. Vous le trouvez en jardinerie ou sur internet sous forme de poudre ou de correcteurs TAC+ ou Alka+.<\/p>\n<p>Comptez 5 \u00e0 10 \u20ac\/kg en vrac, ou 20 \u00e0 30 \u20ac pour un seau de 5 kg. Les correcteurs type TAC+ co\u00fbtent 15 \u00e0 25 \u20ac\/kg.<\/p>\n<h3 id=\"le-dosage-exact\"><span class=\"ez-toc-section\" id=\"Le_dosage_exact\"><\/span>Le dosage exact<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>R\u00e8gle simple : 150 \u00e0 200 g\/m\u00b3 pour gagner +10 ppm de TAC. Sur une piscine de 50 m\u00b3, cela repr\u00e9sente 1,5 \u00e0 2 kg.<\/p>\n<p>Formule pr\u00e9cise : Q (kg) = (TAC souhait\u00e9 &#8211; TAC actuel en mg\/l) \u00d7 volume (l) \/ 590 000<\/p>\n<h3 id=\"les-\u00e9tapes-\u00e0-suivre\"><span class=\"ez-toc-section\" id=\"Les_etapes_a_suivre\"><\/span>Les \u00e9tapes \u00e0 suivre<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Filtration en marche. Diluez le bicarbonate dans de l&#39;eau chaude. Versez lentement devant les skimmers ou refoulements. Attendez 24 heures. Retestez. R\u00e9p\u00e9tez si n\u00e9cessaire.<\/p>\n<p>Pas de baignade pendant 24 heures apr\u00e8s l&#39;ajout.<\/p>\n<h2 id=\"comment-\u00e9viter-que-le-ph-monte-\"><span class=\"ez-toc-section\" id=\"Comment_eviter_que_le_pH_monte\"><\/span>Comment \u00e9viter que le pH monte ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Fractionner les doses, c&#39;est le seul vrai moyen. R\u00e9partissez votre quantit\u00e9 totale sur 3 \u00e0 4 jours, \u00e0 raison d&#39;un tiers par jour maximum.<\/p>\n<p><strong>L&#39;ordre de correction ne se discute pas<\/strong> : TAC d&#39;abord, pH ensuite. Jamais l&#39;inverse. Si le pH d\u00e9passe 7,4 apr\u00e8s correction, utilisez du bisulfate de sodium (pH-). \u00c9vitez l&#39;acide chlorhydrique, trop agressif.<\/p>\n<p>Autre astuce : v\u00e9rifiez la temp\u00e9rature de votre eau. Au-dessus de 20 \u00b0C, le bicarbonate se dissout mieux et agit plus r\u00e9guli\u00e8rement.<\/p>\n<h2 id=\"tableau-de-correction-rapide\"><span class=\"ez-toc-section\" id=\"Tableau_de_correction_rapide\"><\/span>Tableau de correction rapide<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table>\n<thead>\n<tr>\n<th>Probl\u00e8me<\/th>\n<th>Sympt\u00f4me<\/th>\n<th>Solution<\/th>\n<th>Dosage (50 m\u00b3)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>TAC &lt; 80 ppm<\/td>\n<td>pH fluctuant<\/td>\n<td>Bicarbonate de sodium<\/td>\n<td>1,5 \u00e0 2 kg<\/td>\n<\/tr>\n<tr>\n<td>pH monte apr\u00e8s correction<\/td>\n<td>pH &gt; 7,4<\/td>\n<td>Bisulfate de sodium (pH-)<\/td>\n<td>0,5 \u00e0 1 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"pourquoi-votre-tac-baisse-t-il-\"><span class=\"ez-toc-section\" id=\"Pourquoi_votre_TAC_baisse-t-il\"><\/span>Pourquoi votre TAC baisse-t-il ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Pluie, remplissage d&#39;eau, baigneurs, jets de surface : tout dilue ou consomme le <strong>TAC de votre piscine<\/strong>. Le brassage naturel \u00e9vacue du CO2, ce qui tire le TAC vers le bas au fil du temps.<\/p>\n<p>Un <strong>TAC faible<\/strong> (sous 80 ppm) rend l&#39;eau instable. Le pH part dans tous les sens, le chlore perd en efficacit\u00e9, et les liners ou m\u00e9taux commencent \u00e0 souffrir. Irritations de la peau garanties.<\/p>\n<p>La plage cible : 80 \u00e0 120 ppm. Testez chaque semaine avec des bandelettes ou un kit colorim\u00e9trique.<\/p>\n<h2 id=\"entretenir-le-tac-sur-la-dur\u00e9e\"><span class=\"ez-toc-section\" id=\"Entretenir_le_TAC_sur_la_duree\"><\/span>Entretenir le TAC sur la dur\u00e9e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Une correction tient 1 \u00e0 2 semaines avec une piscine peu fr\u00e9quent\u00e9e. Testez plus souvent en \u00e9t\u00e9 ou apr\u00e8s de fortes pluies.<\/p>\n<p>Voici les bons r\u00e9flexes \u00e0 adopter :<\/p>\n<ul>\n<li>Tester l&#39;eau chaque semaine<\/li>\n<li>Couvrir la piscine hors saison<\/li>\n<li>Ajuster apr\u00e8s chaque remplissage ou pluie importante<\/li>\n<li>Maintenir la filtration active quotidiennement<\/li>\n<\/ul>\n<p>Budget annuel pour une piscine de 50 m\u00b3 : comptez 50 \u00e0 100 \u20ac en produits TAC et pH. Rien de ruineux pour une eau stable toute la saison.<\/p>\n<h2 id=\"et-maintenant-\"><span class=\"ez-toc-section\" id=\"Et_maintenant\"><\/span>Et maintenant ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Mesurez votre TAC aujourd&#39;hui. S&#39;il est sous 80 ppm, sortez le bicarbonate de sodium. Fractionnez sur 3 jours, testez apr\u00e8s chaque ajout. Votre eau sera stable, votre pH aussi.<\/p>\n<p><em>Camille<\/em><\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div itemscope=\"\" itemtype=\"https:\/\/schema.org\/FAQPage\">\n<div itemscope=\"\" itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<h3><span class=\"ez-toc-section\" id=\"Comment_augmenter_un_TAC_faible_sans_faire_monter_le_pH_au-dela_de_72_a_74\"><\/span><span itemprop=\"name\">Comment augmenter un TAC faible sans faire monter le pH au-del\u00e0 de 7,2 \u00e0 7,4 ?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div itemscope=\"\" itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">Utilisez du bicarbonate de sodium en doses fractionn\u00e9es : 150 \u00e0 200 g\/m\u00b3 pour +10 ppm. Filtration 24 heures, ajout dilu\u00e9 dans l&rsquo;eau chaude. Si le pH monte quand m\u00eame, corrigez avec du bisulfate de sodium.<\/p>\n<\/div>\n<\/div>\n<div itemscope=\"\" itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<h3><span class=\"ez-toc-section\" id=\"Comment_baisser_ou_augmenter_le_TAC_dune_piscine\"><\/span><span itemprop=\"name\">Comment baisser ou augmenter le TAC d&rsquo;une piscine ?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div itemscope=\"\" itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">Pour augmenter : bicarbonate de sodium, formule Q (kg) = (TAC souhait\u00e9 &#8211; actuel en mg\/l) \u00d7 volume (l) \/ 590 000. Proc\u00e9dez progressivement pour limiter la hausse du pH.<\/p>\n<\/div>\n<\/div>\n<div itemscope=\"\" itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<h3><span class=\"ez-toc-section\" id=\"Comment_augmenter_lalcalinite_dune_piscine_ou_la_baisser\"><\/span><span itemprop=\"name\">Comment augmenter l&rsquo;alcalinit\u00e9 d&rsquo;une piscine ou la baisser ?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div itemscope=\"\" itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">Bicarbonate de sodium, 1,5 \u00e0 2 kg pour 50 m\u00b3. L&rsquo;impact sur le pH reste faible si vous fractionnez. Mesurez apr\u00e8s 24 heures de filtration.<\/p>\n<\/div>\n<\/div>\n<div itemscope=\"\" itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<h3><span class=\"ez-toc-section\" id=\"Quels_sont_les_symptomes_dun_TAC_trop_bas\"><\/span><span itemprop=\"name\">Quels sont les sympt\u00f4mes d&rsquo;un TAC trop bas ?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div itemscope=\"\" itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">pH instable, irritations de la peau, corrosion des \u00e9quipements et du liner. Visez 80 \u00e0 120 ppm pour une eau saine.<\/p>\n<\/div>\n<\/div>\n<div itemscope=\"\" itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n<h3><span class=\"ez-toc-section\" id=\"TAC_et_pH_quel_ordre_de_correction\"><\/span><span itemprop=\"name\">TAC et pH : quel ordre de correction ?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div itemscope=\"\" itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n<p itemprop=\"text\">TAC d&rsquo;abord, pH ensuite, 24 heures plus tard. Cet ordre \u00e9vite les oscillations chimiques en cha\u00eene.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Augmenter le TAC sans faire grimper le pH, c&#39;est possible. La cl\u00e9 : du bicarbonate de sodium, des doses fractionn\u00e9es, et de la patience. La r\u00e9ponse directe : bicarbonate de sodium en doses fractionn\u00e9es Une seule solution fiable pour augmenter le TAC piscine sans d\u00e9stabiliser le pH : le bicarbonate de sodium (NaHCO3). Voici comment&#8230;<\/p>\n","protected":false},"author":1,"featured_media":653,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[5],"tags":[],"class_list":["post-652","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-entretien-piscine"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Comment augmenter le TAC sans augmenter le pH : m\u00e9thode test\u00e9e 2026<\/title>\n<meta name=\"description\" content=\"Comment augmenter le TAC sans augmenter le pH ? 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