C
Chiefmcfuz
Guest
Well I need to calibrate my new ph probe for my new RK2 and I don't have any calibration fluid packets. They are 99 cents each for a 7 and a 10 at DR F&S and the shipping is $9.99 which I think is out of control. Anyone got a 99cent packet laying around of 7 and 10 calibration fluid that they aren't using?