| | Re: I Must Be Doing Something Right
The CarbonDoser is not calibrated to the CO2 concentration directly. The pH controller simply turns the CO2 flow on and off based on the pH. Once the CarbonDoser is turned on by the controller the CO2 is released at a very consistent rate. The rate of flow of CO2 is determined by the CarbonDoser via the bubble rate (electronically) and the size of the bubbles (by the pressure). The pH probe attached to the pH controller can be calibrated using buffers.
The CO2 concentration is determined by the relationship between the pH and the hardness, the way I understand it.