yes u need to keep it wet and it keeps it from drying out if u don't have any of that then kepp it insome of ur nute water mix as it's already sitting in it already or atleast mine is i have the nutradrip trimeter
palerider7777 Reviewed by palerider7777 on . 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