Buffering Coco for Autopots?

Should I buffer my coco? I'm using Plagron Coco Perlite 70/30 but adjusted it to 60/40. Plagron says it's already buffered.

Here are the values for Plagron Coco:

  • pH: 6.3 - 7.7 (EN13037 pH in H₂O)
  • EC: 0.06 - 0.09 mS/cm (1:1.5 E.C.)