PH pen Storage Solution??

[Comatose]

I always just put some H20 in the cap at a pH of 7.0. Works like a charm on my Truncheon.

Comatose Reviewed by Comatose on 10-10-2007. PH pen Storage Solution?? In the instructions it says to store the electrode with a few drops of HI 70300 Storage Solution... Do not use deionized or distilled water.. Is the storage solution necessary? Is it like vitamin D or something just so it doesn't dry out? Rating: 5