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Zaireguy

Great video from brs on raised alk and cal levels

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my number

alk 8.5

ca  460

mg 1300

ph with apex 7.6-8.0,  but with test kit 8.1-8.4     

 

I need to recalibrate my ph probe.    How often should I do this

 

I use kalkwasser for ato replacements. 

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