Quote Originally Posted by OLDJIMMYBONES
ok heres the deal, i dont have any test solution, but i tested some tap and purified water and some vinegar and the digital show what it should be and matches the lit paper but agian when i put it in the revisor i get the same results as before, and dont want to add a shit load of ph up and kill my plants. so i have no idea
Just as you can't operate a car without motor oil, you can't operate a digital pH meter without cleaning and calibrating solutions.

Liquid Karma is a dark reddish brown. Maybe the LK is affecting the strips in a weird way. Reaper would probably know more about that - I think he's been using strips for a long time.

...Or you could get a liquid test kit for about $8.95 and really drive yourself crazy.