This solution is designed to accurately measure the carbon dioxide level in an aquarium.
Now you can purchase only the solution to measure the CO2 level in aquarium, without having to buy the entire kit every time.
Refresh only the solution when needed and maintain ideal conditions for your aquarium inhabitants.
Volume: 50ml
Add 1-4 ml of the indicator solution to the drop-checker. The color change occurs within 1-3 hours.
Compare the color with the scale from the rikka CO2 Test kit.