ISTA CO2 Indicator

Allow you to monitor the CO2 level in your tank from any angle.
With smart design to prevent any chance of spill of the indicator solution.
Reusable color chart sticker provides convenience in location change of the sticker.

Usage:
Take apart the CO2 Indicator.
Add 1cc of indicator solution to the reservoir then reattach the CO2 Indicator firmly.
Submerse the CO2 indicator vertically and attaché to the desired location inside the tank by suction cup.
Stick the color chart on the glass wall of the tank ( the position to cover the suction cup ) to read the CO2 level in your tank.
Change solution every 2 – 4 weeks. Solution change at water change is NOT necessary.
Yellow-green display: excessive CO2
Green shows: CO2 is normal
Blue display: insufficient CO2