Hi, new to the forums here and I’m just looking for some advice. Im currently on my first soilless grow and I figured coco coir growers might be able to help me.

The mix I am using is found on this page

http://www.jvk.net/wp-content/uploads/2018/09/ASB-The-Growers-Choice.pdf

I’m using the ABS VPW420 mix. If someone could check this out and tell me what PH I should be running at that would be awesome. I was thinking 5.8-6 for ph would be ideal to water with since the base ph is really low 5.0 - 5.8 and I have acess to rain water thats base is 6.9 but rain water is super alkaline.

Only posting this dumb question because my clones are growing with purple stems when the plants they were taken from had green stems. Im currently watering with hard well water that I ph to 6.5 but does my mix require a ph lower then that?

Thanks!!!