1. Add 1-2 ml (20-40 drops) of solution to dropchecker.
2. Place dropchecker into aquarium, using suction cup, in front of carbon dioxide source or a filter.
3. The solution changes color based on concentration of carbon dioxide concentration. Color change occurs slowly – over 1-2 hours.
4. Compare the color with included color scale.
In order to get accurate measurements, the temperature of water that is to be tested must be 25°, and room temperature must not be below 20°.
Storage life:24 months, but no more than 12 months since opening.
Keep at 10-25° in dry dark place! Keep out of reach of children
Avoid skin contact! Upon skin contact wash with large amounts of water!