{"product_id":"aquario-generic-drop-checker-co2-ph-pen","title":"CO2 Drop Checker \u0026 pH Pen","description":"\u003cdiv style=\"font-size:15px;line-height:1.65;color:#1b2b2d;\"\u003e\n\u003cp\u003eA CO2 drop checker is a glass indicator that monitors carbon dioxide levels in a planted aquarium by changing color based on the pH of a 4 dKH reference solution: green indicates optimal CO2, yellow means too much, and blue means too little. It gives a reliable visual reading roughly 1-2 hours after placement. The representative unit shown is the UNS Drop Checker, available in suction-cup (SD) and rimless hang-on (HD) styles and supplied with indicator solution; a pH pen complements it for precise readings.\u003c\/p\u003e\n\u003cdiv style=\"margin:26px 0 8px;border:1px solid #e3d6be;border-radius:14px;overflow:hidden;max-width:720px;\"\u003e\n\u003cdiv style=\"background:#1e535b;color:#fbf9f3;padding:13px 18px;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;\"\u003eSpecifications\u003c\/div\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;line-height:1.5;margin:0;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"background:#f7f4ec;\"\u003e\n\u003ctd style=\"padding:11px 18px;color:#566a6c;font-weight:600;width:40%;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eUse\u003c\/td\u003e\n\u003ctd style=\"padding:11px 18px;color:#123e45;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eMonitor CO2 level in planted tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:11px 18px;color:#566a6c;font-weight:600;width:40%;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eMethod\u003c\/td\u003e\n\u003ctd style=\"padding:11px 18px;color:#123e45;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eColor change of 4 dKH indicator solution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f7f4ec;\"\u003e\n\u003ctd style=\"padding:11px 18px;color:#566a6c;font-weight:600;width:40%;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eColor Guide\u003c\/td\u003e\n\u003ctd style=\"padding:11px 18px;color:#123e45;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eGreen = optimal, Yellow = high CO2, Blue = low CO2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:11px 18px;color:#566a6c;font-weight:600;width:40%;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eReading Time\u003c\/td\u003e\n\u003ctd style=\"padding:11px 18px;color:#123e45;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003e~1-2 hours after placement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f7f4ec;\"\u003e\n\u003ctd style=\"padding:11px 18px;color:#566a6c;font-weight:600;width:40%;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eMount Options\u003c\/td\u003e\n\u003ctd style=\"padding:11px 18px;color:#123e45;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eSD (suction cup) \/ HD (rimless hang-on, up to 10 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:11px 18px;color:#566a6c;font-weight:600;width:40%;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003eIncluded\u003c\/td\u003e\n\u003ctd style=\"padding:11px 18px;color:#123e45;border-bottom:1px solid #ece4d4;vertical-align:top;\"\u003e15 ml indicator solution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Aquario","offers":[{"title":"Default Title","offer_id":47596028231858,"sku":"AQUARIO_GENERIC_DROP_CHECKER_CO2","price":28.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/5103\/3778\/files\/UNS-Ultum-Nature-System-CO2-Drop-Checker-SD-Indicator-1.jpg?v=1781740673","url":"https:\/\/marenmarine.com\/products\/aquario-generic-drop-checker-co2-ph-pen","provider":"Maren Marine","version":"1.0","type":"link"}