PH problem

Adding spagnum peat moss to the soil will lower the soil's pH. As the peat breaks down, the soil will increase in acidity. Cannabis likes soil that is slightly acidic, in the range of 6.2-6.5.

I would buy a soil pH test kit to determine the soils pH before ammending your soil with anything. I am unsure how you are measuring the soils pH with a pH meter and it could be that the water you are using is having profound and confusing effects on your pH readings.
 
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