If your pool is lined with mosaic tiles (gresite)<\/strong> and your water chemistry took a dive \u2014 literally \u2014 you might be seeing the aftermath of a low pH<\/strong>. No worries, though. Let\u2019s dive into what happened and how to fix it like a pro.<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.24.1″ _module_preset=”default” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_row _builder_version=”4.24.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.24.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/test2.eurobuild.es\/wp-content\/uploads\/2025\/07\/pool_grout_problem.webp” alt=”pool_grout_problem” title_text=”Pool grout problem” force_fullwidth=”on” _builder_version=”4.24.1″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.24.1″ _module_preset=”default” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_row _builder_version=”4.24.1″ _module_preset=”default” custom_padding=”||0px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.24.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.24.1″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n When your pool\u2019s pH drops too low<\/strong>, the water becomes acidic \u2014 and acid doesn\u2019t play nicely with cement-based grout. Over time, this eats away at the mineral content, especially calcium, causing:<\/p>\n Grout to feel soft, chalky, or crumbly<\/strong><\/p>\n<\/li>\n Gaps<\/strong> between your tiles<\/p>\n<\/li>\n Loose or popping tiles<\/strong> in severe cases<\/p>\n<\/li>\n<\/ul>\n Think of it as your grout being slowly “melted” by acid. Yikes!<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.24.1″ _module_preset=”default” custom_padding=”0px||0px|||” global_colors_info=”{}”][et_pb_row _builder_version=”4.24.1″ _module_preset=”default” custom_padding=”||0px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.24.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.24.1″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.24.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.24.1″ _module_preset=”default” global_colors_info=”{}”][et_pb_accordion _builder_version=”4.24.1″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″][et_pb_accordion_item title=”\u2705 Step 1: Fix the Water Chemistry First” open=”on” _builder_version=”4.24.1″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n Before grabbing any tools or products, stabilize your pool water<\/strong>:<\/p>\n pH:<\/strong> 7.2 \u2013 7.6<\/p>\n<\/li>\n Alkalinity (TAC):<\/strong> 80\u2013120 ppm<\/p>\n<\/li>\n Calcium hardness:<\/strong> 200\u2013400 ppm<\/p>\n<\/li>\n<\/ul>\n \ud83d\udca1 Pro tip: Low calcium makes grout even more vulnerable. Test and balance your water weekly!<\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”\u2705 Step 2: Assess the Damage” _builder_version=”4.24.1″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” open=”off” sticky_enabled=”0″]<\/p>\n Not all grout issues are equal. Here’s how to tell what you\u2019re dealing with:<\/p>\nWhy Did My Pool Grout Go Soft?<\/h2>\n
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\n<\/h2>\n
Can It Be Fixed? Yes \u2014 Here\u2019s How:<\/h1>\n
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![\"\"](\"https:\/\/test2.eurobuild.es\/wp-content\/uploads\/liner-pool-1.jpg\")
<\/p>![\"\"](\"https:\/\/test2.eurobuild.es\/wp-content\/uploads\/42-300x225.jpg\")
<\/p>![\"\"](\"https:\/\/test2.eurobuild.es\/wp-content\/uploads\/liner-pool-3-300x225.jpg\")
The vinyl used is not biodegradable. A typical liner weighs about 120-150 Kg, and here on the southern Spain, because of the powerful sun UV, it lasts about six to nine years. That means every liner pool out there is generating around 25 kg of vinyl waste every year, an equivalent of ![\"\"](\"https:\/\/test2.eurobuild.es\/wp-content\/uploads\/overflow-pool-design-1024x576.jpg\")
<\/p>![\"\"](\"https:\/\/test2.eurobuild.es\/wp-content\/uploads\/eden-fibreglass-vs-gunite.jpg\")
<\/a><\/p>","_et_gb_content_width":"","iawp_total_views":53,"footnotes":""},"categories":[875],"tags":[878,881,884,887,890,806,893,896,899,902,905,908,911,914],"class_list":["post-31468","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-piscina","tag-acido","tag-agua-acida","tag-agua-piscina","tag-alcalinidad","tag-desaparece","tag-gresite","tag-junta","tag-juntas-blandas","tag-lechado","tag-ph","tag-ph-acido","tag-ph-bajo","tag-piscina","tag-rejuntado"],"_links":{"self":[{"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/posts\/31468","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/comments?post=31468"}],"version-history":[{"count":10,"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/posts\/31468\/revisions"}],"predecessor-version":[{"id":31501,"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/posts\/31468\/revisions\/31501"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/media\/31462"}],"wp:attachment":[{"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/media?parent=31468"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/categories?post=31468"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test2.eurobuild.es\/ro\/wp-json\/wp\/v2\/tags?post=31468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}