Local calibration solution

phc567

New member
Hello.
I'm looking for 4.0 calibration solution for ph probe. By any chance does anyone know of a store that sells it local in sf ?
 

phc567

New member
Hella far. I’m the ultimate lazy reefer. Lol. Was hoping someone knew a secret place in sf. Guess on line order is my friend. ������
 
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