Fix pH or respect 12/12 lighting cycle?

[Help_Needed]

Hope you caught it in time.

I think I did. As of this morning only a single leaf on a single plant (the biggest) showed any sign of problems. And, although I didn't spend a lot of time in there, the plants still looked ok, so they *should* be alright.

One thing I've learned the hard way about hydro is that nute problems tend to hit hard and very fast, especially compared to soil.