Hm I dont know. I'd been on grow nutes when it first happened to me. But could be though. PH can be a little hard to nail down I guess, so many variables, but it's important. This has been my first hydro grow, so steep learning curve for sure.

As it is now, I know I might need to up it 1 10th each morning, at the very most. And that seems pretty good so I'm not fooling with methods until next time.