Hello, i bought a ph pen years ago, i used distilled water to calibrate and to store it, it lasted few weeks...
I have a new one, does i need distilled water with calibration powder or can i use RO water ?
I've read that KCL is needed for storage, i don't have any is there any other option ? thx
I have a new one, does i need distilled water with calibration powder or can i use RO water ?
I've read that KCL is needed for storage, i don't have any is there any other option ? thx