Randy Holmes-Farley
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I've decided I need to be a bit more empirical about this -- the role that ambient CO2 plays in pH and alkalinity consumption. And it'd be nice to have a solid data package to share with Neptune if/when I engage them if I'm unable to otherwise figure this out.
Since I log all the Apex sensor/measurement data in an influxDB database and plot using Grafana, it's trivial to extract daily min/max/mean for alk and pH, and Apex shows daily alkalinity dose with the click of a button. CO2 parameter extraction requires a bit more work but nothing difficult -- export daily data, convert from string to number, and find max/min/mean via excel function.
So I've started a spreadsheet logging daily pH, alk, and CO2 min/max/mean along with daily alkalinity dose. I'm curious to see what the data shows once it's all combined and plotted.
If you want to test if there is any lag, doing experiments is perhaps the best way. Manually add some alk and see what happens to alk readings. Same could be done for a drop using sodium bisulfate.