keep the whole pen in some nute water? the reservoir? or do you mean just drop a few drops of nute water into the cap that covers the electrode?
Illusion Reviewed by Illusion 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