Keep track of the Co2 levels in your aquarium with this handy CO₂ permanent tester.

The liquid in the vial changes colour depending upon the C02 levels.

Carbon dioxide (CO₂) assists your aquatic plants to grow and thrive. Without sufficient combinations of CO₂ and lighting, aquatic plants are unable to photosynthesise and grow.

Suitable For: Coldwater and Tropical Planted Aquariums