Aqua One CO2 Permanent Tester

The Aqua One CO2 Permanent Tester is a simple and effective tool designed to continuously monitor carbon dioxide (CO2) levels in planted aquariums. Maintaining the correct CO2 concentration is essential for healthy plant growth while ensuring fish and shrimp remain safe and comfortable. This permanent tester provides a convenient visual indication of CO2 levels directly inside the aquarium, helping aquarists quickly identify whether CO2 levels are too low, ideal, or excessive. Ideal for planted freshwater aquariums, the Aqua One CO2 Permanent Tester allows for ongoing monitoring without the need for constant manual testing. Its easy-to-read colour indicator makes it suitable for both beginner and experienced aquascapers. Product Type: Permanent in-tank CO2 indicator Suitable For: Freshwater planted aquariums Design: Compact glass or acrylic drop checker style tester Colour Indicator: Uses colour-changing solution to display CO2 concentration levels Installation: Attaches inside aquarium glass using suction cup Function & Performance Purpose: Continuously monitors dissolved CO2 levels in the aquarium Reading Method: Colour-based indication system Typical Colour Guide: Blue = Low CO2 Green = Ideal CO2 range Yellow = Excessive CO2 Monitoring Style: 24-hour passive monitoring Best Use: Planted aquariums using pressurised or DIY CO2 systems Aquarium Requirements Suitable Aquarium Type: Freshwater planted aquariums Placement: Position opposite the CO2 diffuser for more accurate readings Water Temperature Compatibility: Suitable for standard tropical freshwater aquariums Recommended Maintenance: Replace indicator solution regularly for accurate readings