CO2 Drop Checker Kit includes:

• Glass Drop Checker
• Suction Cup
• 15ml Solution

Add approximately 15 drops of solution to drop checker and rotate drop checker to get the liquid into the bulb.

While holding the drop checker with the opening pointed downwards, place the drop checker into the aquarium roughly 3 inches below the water level ensuring there is air trapped inside. Keep away from CO2 bubbles to prevent any inaccurate readings.

Wait at least 12 hours for the solution to reflect the proper CO2 levels in your aquarium.

Adjust CO2 according to the drop checker color:

• Blue = Low CO2, increase CO2 dosing in small increments
• Yellow = High CO2, decrease CO2 dosing
• Green = Optimal CO2 level

Leave drop checker in aquarium for constant CO2 monitoring.

Replace solution once a month.