INKBIRDPLUS Portable CO2 Detector Mini Indoor CO2 Monitor NDIR Sensor with Full Color LCD Indicator
Aliexpress UK
Add 1cc of indicator solution to the reservoir then reattach the CO2 Indicator firmly. Allow you to monitor the CO2 level in your tank from any angle. Take apart the CO2 Indicator. Stick the colour chart on the glass wall of the tank (the position to cover the suction cup) to read the CO2 level in your tank.
eBay
The Fluval CO2 Indicator Set performs the simple and important task of monitoring carbon dioxide levels in aquariums to help keep your live plants strong and healthy. The CO2 Indicator Kit includes a 15ml CO2 Indicator Liquid and Glass reservoir complete with suction cup.
eBay
Ista Aquarium CO2 Indicator Solution 10ml.
eBay
The Colombo CO2 Indicator is a reliable and easy-to-read carbon dioxide monitor designed specifically for aquariums. Made by the trusted brand Colombo, this product ensures accurate readings of CO2 levels, allowing aquarium owners to maintain optimal conditions for their fish. With its user-friendly design, this CO2 indicator provides peace of mind for pet owners looking to create a healthy environment for their aquatic pets.
eBay
Features: glass drop checker. suction cups included. glass drop check is about 6cm/2.36" in height. Used to test and monitor the concentration of the aquarium water plants fish for tank. Transparent. Specifications: Material: Glass Size: app. 6cm/2.36" in height Color: Transparent Package Includes: 1 x glass drop checker note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
eBay
Depending on the colour of the drop checker you can adjust your CO2 dose until the desired level of CO2 is reached. Position the drop checker in the aquarium so it is visible, but such that CO2 bubbles from your diffuser do not easily enter the drop checker, which could result in inaccurate reading.
eBay
Fluval CO2 Indicator Set. The CO2 indicator set performs the simple and important task of monitoring carbon dioxide levels in aquarium water to help you keep heathly live plants. Visibly changes colours to indicate low, ideal or high CO2 levels.
eBay
Colombo CO2 Indicator. The indicator continuously shows the CO2 value of the water. This way you can adjust your CO2 system to the correct amount of CO2 needed for your plants. The CO2 indicator is an indispensable aid when using a CO2 system.
eBay