Rhinox CO2 Bubble Counter, Accurate CO2 Reading, Used CO2 Diffuser Set for DIY Project, 1-pcs
- ...to securely fasten it to the outside wall of your aquarium. Being outside of your tank, there is no distraction from the beauty of your underwater space..
- Easy to Read Accurate Water Level --- Once the equipment is installed and attached, it is time to count the bubbles. A solid black line against the transparent vessel clearly indicates how much water you should put into your CO2 regulator. It should be filled just below the black line. Having the correct amount of water in your bubble counter is essential to accurately count the bubbles and determine the amount of CO2 in your tank water..