Quote Originally Posted by stinkyattic
Good question, and I don't want to mislead you- I do not know if there is a difference that is dependent upon delivery method, but personally, I would actually hand-water soilless right AT 6.5, making sure my nutrient solution was correct. I'm not someone to ask on this one, since you can see in my grow log that I jsut royally fucked up a soilless (promix) crop by forgetting to check my EC and as a result never thought to add CalMag to it
I started off in promix and then transplanted into a 50/50 mix of promix and fox farms ocean forest.. followed by my latest transplant of going back into 100% promix.

I started off watering until my runoff read between 6.3-6.8 just like soil. My plants are doing fairly well considering and any problems had were due to my own doing. I can say that 6.3-6.8 has worked great for me, but at the same time I can't say for certain that I would've gained greater benefits fro a lower ph.
daihashi Reviewed by daihashi on . Medium ph vs nutrient ph?????? For some reason I'm having a problem understanding this relationship. When you take promix, or coco and check the ph they come out 5.6 to 6.0. That's measuring by taking a cup of medium, filling with water (tap water at 8.0) and let set for an hour. Drain off and stick ph meter in. Based on this, what is the use of measuring medium ph? If one hand waters with 6.5 nutrient solution the runoff will most certainly be lower than 6.5. I guess I'm trying to understand if the ph of the Rating: 5