Dkh reading with pH reading

[Michael Gray]

@Randy Holmes-Farley

Just a quick question. I've noticed my auto kh director rises slightly every day at the 6am reading when the pH hits the all time low. Like 7.9 to 8.0. It doesn't rise much but on the test just .1. Everytime. Example. 7.8 at night when pH is 8.20. But when it hits 7.9 or 7.96. It seems all reading changes however slightly. Just asking if there is a correlation between pH and kh

 

[Larry L]

Yes, they are related: https://www.reef2reef.com/threads/mindstream-aquarium-monitor.207683/post-2386463

 

[Randy Holmes-Farley]

They are related mathematically through the CO2 level. If you know any of the two, you could calculate the third.