That sounds exactly as expected...Your runoff had pH of 7, you watered with pH of 6, you then ended up having runoff with pH of 6.5 (the average of the two). Any kind of pure water should be right around 7, so not sure why yours would be 6. Is it a paper test kit? Or electronic pH tester? Maybe by a different test kit if it's paper...if it's electronic, make sure it's calibrated correctly. You could buy a "buffer" solution from your local grow shop and try your test kit out on that...if it reads anything other than 7, you'll know you have a bunk test kit.
ghengis Reviewed by ghengis on . ph problems I been getting sign of high ph so,i checked the run off with a ph test kit and the reading was at 7. so i bought a couple gallons of ro water and checked the ph and it reads around fivish 6.00,could this be right?So i watered it again and then checked the run off and it reads 6.5 with the ph test kit oh,the soil I use is fox farm ocean forest.Anyone familiar r/o water and ffof soil Rating: 5