Everything you need to clean and maintain your conductivity probe. The meter is only accurate if the probe is clean. Accurate readings provide improved growth as the plant has its specific pH level at which it grows best. For "herbs" a pH of 5.5 is ideal for vegging and about pH 6.0 for the flowering cycle. Proper probe maintenance also ensures you maximize the life of the probe. The probe surface takes the reading of the solution and if the probe surface is dirty, the readings may be inaccurate.
A tip… if the conductivity reads low, the probe needs cleaning or batteries have to be changed.
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