pH Up/Down are crucial for hydro. I've looked into other 'homebrew' ideas like vinegar and lemon juice, but they will make the pH fluxuate wildly. pH Up/Down are much more stabilized.
Good luck on your grow!
medicinegivers Reviewed by medicinegivers on . ph problem in hydroponic system!!! please help!!! hey cannabis.comhow we doing people, i have a bit of a ph problem that i was wondering if anyone out there could please help me with!!!! i'm 3 weeks away from harvesting and for the past previous 2 weeks i've been having a ph problem that i'm not shore how to fix, i am growing in a NFT hydroponic system my nuts are kept between 700 and 800 ppm TDS and i change the water in my res once a week, when changing the water in my res i ph my res water to a ph of 5.8 but by the following day the ph will Rating: 5