I have been testing my alk and cal Daily with my Hanna checker and I have noticed I’m using a lot more alk vs cal. My system is mostly sps but some mixed .
cal 420
Alk 9
Mag 1300
cal 420
Alk 9
Mag 1300
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This is an illusion. The issue here is that daily Alk consumption is as large or larger than measurement error, but daily Ca consumption is much smaller than your uncertainty. So you have better quality data on Alk - but I promise they are both being consumed by the calcification process in the known ratio to form CaCO3.I have been testing my alk and cal Daily with my Hanna checker and I have noticed I’m using a lot more alk vs cal.