For hydro I like 5.6-6.0 and can't say I've ever had troubles at that ph. I personally think 6.5 is too high for hydro.

Cool chart Treetops!! :thumbsup:
Weedhound Reviewed by Weedhound on . what is the best ph# for the water to be. what is the best ph# for the water to be after u add the veg firts. this is for a clone I have. I just mixed some water and veg ferts with some cal-mag+. the ph came out to 6.5 I havent changed the water yet. I wanted to ask if that is an ok ph to have for a clone in dwc . she has had 1 inch roots for around 5 days or so now. wanted to make her a mother plant.:D Rating: 5