CO2 Indicator solution, easy and convenient to use without the need of aquarium water.
Use with Glass CO2 Checker.
Volume : 15ml per bottle
1) Put 15 drops of CO2 Indicator Liquid into CO2 Checker. Do not add in any water.
2) Place inside your aquarium, observe the indicator colour.
3) Compare the colour to know CO2 level content in aquarium.
4) Recommend to change CO2 Indicator Liquid in checker every 30days.