Description
Product: Aquarium CO2 Indicator
Test solution capacity: 15ml
Model: Musical note/Ball/Water drop/Hook
For: Aquarium plants
Note: the test solution should be replaced once a month.
Color and co2 concentration:
Blue: low concentration of co2, poor aquatic plants, slow growth
Green: The concentration of co2 is normal, which guarantees the photosynthesis of plants and the safety of fish and shrimps.
Yellow: The concentration of co2 is too high, causing the fish and shrimp to die due to hypoxia.

Features
1. The change of the three colors of the detection fluid indicates the CO2 concentration of the fish tank.
2. The indicator made of glass is corrosion-resistant, simple and beautiful.
3. There are 4 types of indicators for you to choose.

Package include
1 bottle x Indicator solution
Or 1 set x Indicator + solution