Jun 10, 2021 #1 D datfatboi Well-Known Member has anyone had issues with cheap calibration powder from china? it looks exactly the same as the normally priced one. pretty sure it's the same product? (i'm talking about the classic green and red 4.01 and 6.86 ph packets)
has anyone had issues with cheap calibration powder from china? it looks exactly the same as the normally priced one. pretty sure it's the same product? (i'm talking about the classic green and red 4.01 and 6.86 ph packets)
