SOIL PH OUT OF RANGE 4.5 TO 5.5

I just used my gro line soil ph meter for the first time and I checked my super soil's ph outside in my smart pots and its ranging from 4.5 to 5.5... should I raise it, and what should I use/ add to raise the ph of the soil to 6.5, 7 ?

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You should check your runoff with a ph pen, the soil ph meters aren't all that accurate from what I've read.

Personally I'm only concerned with the PH going into the soil.

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