My soil ph is kinda high, how can i lower it?

[CTABB83]

I noticed my soil ph is in the upper 7's and I haven't added anything since planting. I'm using ocean forest and r/o water. My water ph is 6.2. How can I lower it before it becomes a real issue? Thanks guys.

 

[GreenMtnGuru]

Used coffee grounds or Epsoma Soil Acidifier (avail at Lowe’s) are good quick fixes.

 

[CTABB83]

Used coffee grounds or Epsoma Soil Acidifier (avail at Lowe’s) are good quick fixes.

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Well I guess I can't trust the meter. I did a slurry with r/o water reading neutral and a digital ph pen I bought and got this 5.5. Glad I bought a backup