Coco - canna PK 13/14 pH problems

Discussion in 'Hydroponic Growing' started by jdh, Apr 10, 2016.

  1. hi all,

    So I'm trying to give my girl a little PK spike with Canna PK 13/14.

    When I mix my nutes, I normally first pH my water, then add coco A+B+cannazym and then dilute a bit with tap in case pH overshoots.

    Yesterday, I tried adding PK 13/13 after adding the nutes. However, I noticed my solution's pH immediately shot up to 6.3 and I had to use an absolutely insane amount of pH down to bring it back to 5.9. This brought my PPM all the way up to 800, whereas my target was only 600.

    Is this normal? Does PK 13/14 buffer pH to 6.3? How do I manage this effectively?

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