{"id":29609,"date":"2026-08-02T12:32:13","date_gmt":"2026-08-02T02:32:13","guid":{"rendered":"https:\/\/www.greenaquarium.com.au\/?post_type=product&#038;p=29609"},"modified":"2026-08-02T12:34:10","modified_gmt":"2026-08-02T02:34:10","slug":"cup-co2-glass-diffuser-3-5cm","status":"publish","type":"product","link":"https:\/\/www.greenaquarium.com.au\/?product=cup-co2-glass-diffuser-3-5cm","title":{"rendered":"Cup CO2 Glass Diffuser 3.5cm"},"content":{"rendered":"<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\">Add efficient, fine CO2 diffusion to your planted aquarium with the TNA Cup CO2 Glass Diffuser. This compact 3.5cm glass diffuser features a ceramic diffusion disc housed within a &#8220;cup&#8221; style base, which helps collect and hold CO2 micro-bubbles beneath it \u2014 extending contact time with the water and improving overall dissolution and plant uptake before any excess gas escapes to the surface.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\">Simple, compact, and unobtrusive, this diffuser is designed to sit inside the aquarium (typically suction-mounted to the glass) and connects directly to your CO2 tubing.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>Key Features<\/strong><\/p>\n<ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\" dir=\"ltr\">\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Compact 3.5cm size \u2014 suits small to medium aquariums or tight spaces<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Ceramic diffusion disc for fine micro-bubble output<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Cup-style design holds bubbles in place longer for improved CO2 dissolution<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Clear glass construction for a clean, discreet look in the aquascape<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Compatible with standard CO2 tubing<\/li>\n<\/ul>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>Why Choose the TNA Cup Diffuser<\/strong><\/p>\n<ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\" dir=\"ltr\">\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Fine micro-bubbles maximise CO2 contact time and absorption by plants<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Cup design improves on standard diffusers by trapping bubbles for longer dissolution time<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Glass construction won&#8217;t cloud, discolour, or leach chemicals over time<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Compact size makes it ideal for nano and small-to-medium planted tanks<\/li>\n<\/ul>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>Maintenance Tip<\/strong><br \/>\nThe ceramic diffusion disc can become less effective over time as pores clog with mineral deposits or biofilm. Regular cleaning (e.g. soaking in a bleach solution and thoroughly rinsing, or gently scrubbing) helps maintain fine bubble output and diffusion efficiency.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A compact 3.5cm glass CO2 diffuser with a ceramic disc and cup-style design that traps micro-bubbles for longer, more efficient CO2 dissolution.<\/p>\n","protected":false},"featured_media":29611,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[132],"product_tag":[],"class_list":["post-29609","product","type-product","status-publish","has-post-thumbnail","product_cat-supplies","first","instock","shipping-taxable","purchasable","product-type-simple"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=\/wp\/v2\/product\/29609","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=29609"}],"version-history":[{"count":1,"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=\/wp\/v2\/product\/29609\/revisions"}],"predecessor-version":[{"id":29612,"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=\/wp\/v2\/product\/29609\/revisions\/29612"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=\/wp\/v2\/media\/29611"}],"wp:attachment":[{"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29609"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_brand&post=29609"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=29609"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.greenaquarium.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=29609"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}