Need Coco PH advice

[Plant Dad]

I'm growing in Coco for the first time. I've been trying some of this and some of that hoping to discover all the secrets. Coming to end of grow and I feel like I haven't learned a thing. What should should PH run off be? Does it help to know. My runoff PH is 6.8 and 6.9 . I'm top dressing with dry amendments. I'm trying to PH to 6.- 6.2.

 

[gr865]

Don't worry about the runoff pH, just make sure you get good runoff with each water.'