CO2 drop checker kit with fluid

With the "Drop" CO2 tester kit, you have everything you need to effortlessly calculate the CO2 value of your tank. Just look at the color: is the color light green? Then your CO2 levels are good!

This CO2 tester kit is ideal because:

• Everything in one package to start measuring immediately
• Looks particularly stylish in your tank & almost invisible
• Very sturdy laboratory glass: won't break easily
• Easy & quick to clean
• Extremely easy CO2 measurement: healthier aquarium plants
• Includes refill liquid for the coming years.