well, currently i only have a soil ph tester, which i hear is very poor, but i have a digital one on the way...the ph of the soil is between 5-5.5, when the digital comes i will let you kno the ph of the run off...currently i've been unable to ckeck the ph of my water without the tester...i'm also using pro grow at 1/4-1/2 strength...once a week...hope this gives more info