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Color-changing indicator: Instantly shows CO2 levels in the aquarium for easy monitoring
Refillable 15ml solution: Allows for repeated use, reducing waste and cost
Compatible with all aquarium types: Suitable for both freshwater and marine tanks
Simple application: Just add to the CO2 checker and wait 2-4 hours for results
Summarized by Shop
CO2 Indicator solution refill 15ml, for use with CO2 drop checker. Aids in CO2 monitoring by changing colour depending on the concentration of CO2 in the aquarium.
BLUE = too low.
GREEN = normal.
YELLOW = too high
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Directions: Ensure your checker is clean. Add 15 drops of CO2 indicator into the checker and make sure it is stored in the