If you have ever engaged with the subject of CO2 you will know the method of using a permanent test to determine the CO2. A small box which is filled with a reaction liquid is positioned inside the aquarium and changes colour according to the CO2 content. We at JBL call this method of CO2 determination JBL CO2-pH Permanent Test .
But there is another method which not only delivers the measurement result AT ONCE, but also determines the precise value in mg/l. This way of directly determining the CO2 content will help you to set the ideal bubble count on your CO2 system and to monitor the quantity you add.
How to carry out the test with the JBL CO2 Direct Test , the following video shows you how to do it.