In order to get my run off to read between 6.4-6.7, I need to water with water at 7.6. Has anybody else had this problem? I have some nasty issues with my leaves on the plant. I just added dolamite lime to try and sweeten up the soil so I can use lower PH water, but I just dont feel comfortable with this grow.
Sounds like you are doing it right. Buffer your input water to whatever it takes to get the runoff in line.
how much of what kind of ph up do you add to water/ nutrients and what is hte ph before... i ask because it took me 15ml of ph up to go from 4.5 nute solution to 7 and it just seemed like a shitload