Aquarium CO2 Indicator Tester
Aquarium CO2 Indicator Tester
The Aquarium CO2 Indicator Tester helps monitor CO2 concentration in your planted tank with clear color changes for easy visual feedback. Designed to support healthy plant growth and maintain safe levels for fish and shrimp, itβs a must-have for any aquascape setup.
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Specifications
Specifications
- Product Type: Aquarium CO2 Indicator Solution
- Material: Glass + Test Solution
- Color Indicator: Blue / Green / Yellow
- Test Solution Capacity: 15 ml
- Application: Aquarium CO2 Monitoring for Plants and Fish
- Features: Real-time CO2 detection, color indicator system, reusable glass design, easy maintenance
- Usage Frequency: Replace solution every 30 days
Usage Guide
Usage Guide
- Fill the glass indicator with the supplied CO2 test solution.
- Attach the indicator to the inner wall of your aquarium, below the water surface.
- Wait several hours for the solution color to stabilize.
- Replace the solution approximately once per month.
Observe the color:
- Blue β CO2 too low
- Green β Optimal CO2
- Yellow β CO2 too high
Shipping
Shipping
We process orders within 1-2 days. Youβll get a tracking number to follow your package. Shipping time is 5-10 Business days

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Accurate CO2 Detection πΏ
The test solution changes color to indicate carbon dioxide concentration in real time. Blue means low CO2, green shows ideal levels for plant growth, and yellow signals excessive CO2, helping you maintain perfect balance in your aquarium.
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Elegant & Durable Glass Design π§
Made from high-quality, corrosion-resistant glass in multiple styles (musical note, ball, water drop, or hook). Its transparent, decorative look blends beautifully into any tank without disturbing the natural scenery.
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Easy to Use & Maintain π
Simply fill the indicator with the provided test fluid and attach it inside your aquarium. Replace the solution monthly for the most accurate readings and consistent performance.