I stick a little piece of cottonball down in there to keep the solution. The probe rests right on the solution-soaked cottonball.
gainesvillegreen Reviewed by gainesvillegreen on . Storing my ph pen? well i just started to use my ph pen...i heard people keep it in wet sponges to prolong the life .....what does every one do to take care of there ph pens? Rating: 5