Calabrate ph tester
HOW TO STORE THE PH SOLUTIONS LONG TERM (re-use in the future):
1. Place each solution in a clean jar and store out of sunlight (i.e. cupboard or pantry).
2. Label the jar with the correct PH value of the solution
3. The solution will keep for about 8 months before a weird slime begins to develop. Maybe this will never happen, maybe it will happen sooner. None the less, this is how I store mine and they last 8-12 months before it’s time to dump them.
4. Recalibrate the meter, or check in on it’s accuracy using the stored solutions anytime.