Does the pH setting give accurate results in a Kh 0 system?

[mrtank50]

Hello everyone.

I have a question.

In KH0 systems, does a 1 pH decrease provide accuracy?

For example:

Let's say in a KH0 system, the pH of the tank water containing degassed water is 7, and with the addition of CO2, its pH drops to 6.

Let's say in a KH4 system, the pH of the tank water containing degassed water is 7.5, and with the addition of CO2, its pH drops to 6.5.

Is the CO2 released by a 1 pH decrease in KH0 equal to the CO2 released by a 1 pH decrease in KH4?

I hope I've explained it clearly.