TheGrog Member Mar 12, 2008 #1 I have an extra digital pH pen for sale. Also included are several packets of calibration soulution. It works perfectly, just needs batteries. I don't need it any more as I have a monitor. Here is a link to the product: pH Pen New it is $60 It is yours for $30 Reply or PM if interested.
I have an extra digital pH pen for sale. Also included are several packets of calibration soulution. It works perfectly, just needs batteries. I don't need it any more as I have a monitor. Here is a link to the product: pH Pen New it is $60 It is yours for $30 Reply or PM if interested.
