Maintaining the right carbon dioxide (CO2) level is essential for growing healthy aquarium plants and creating a beautiful planted aquarium. CO2 supports photosynthesis, helping aquatic plants grow faster, develop vibrant colours, and produce healthy leaves. However, too much CO2 can be harmful to fish and other aquatic inhabitants. A CO2 Drop Checker Kit is a useful aquarium accessory that helps monitor CO2 levels in planted tanks. In this guide, we will explain how it works
