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measuring pH drop: is this the right way?


3 Nov 2015
The Netherlands
I read a lot about the "pH drop" but I have difficulty to find out how to do this.
So please correct me if I'm wrong;

- Take a cup aquarium water and let stand for 24 hours
- measure the pH of this cup after 24 hours
- measure one hour before the light goes out, the pH in the tank
- the pH in the tank must be 1.0 to 1.2 point lower than the pH inside the cup - then you have about 30 ppm CO2

Is this the correct way?

cheers Cor

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