{"product_id":"co2-drop-checker","title":"Chihiros CO₂ Drop Checker Indicator – CO₂ Level Monitor for Aquariums","description":"\u003cp\u003eThe Chihiros CO2 Drop Checker is a glass indicator vessel used to monitor dissolved CO2 levels in planted aquariums. It works by holding a pH-sensitive indicator solution (4 dKH reference water + pH indicator, sold separately or included) that changes color based on CO2 concentration in the water: blue = too little CO2, green = optimal, yellow = too much CO2.\u003c\/p\u003e\n\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cp\u003eThe drop checker hangs inside the aquarium. CO2 diffuses through the air pocket inside the glass and changes the pH of the indicator solution. The color provides a continuous, real-time visual reference for CO2 levels without test kits or electronic sensors.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-clarity borosilicate glass construction\u003c\/li\u003e\n  \u003cli\u003eVisual CO2 monitoring: blue (low) — green (optimal) — yellow (high)\u003c\/li\u003e\n  \u003cli\u003eNo electricity or calibration required\u003c\/li\u003e\n  \u003cli\u003eWorks in any planted aquarium with CO2 injection\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Chihiros","offers":[{"title":"Default Title","offer_id":53546887184714,"sku":null,"price":9.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3685\/5370\/files\/chihiros-co2-drop-checker-green-indicator.jpg?v=1772720542","url":"https:\/\/aquarium-boutique.com\/bg\/products\/co2-drop-checker","provider":"Aquarium Boutique","version":"1.0","type":"link"}