Major problems, is she a gonner is flower?

Hi all, I'm having major problems , I. Running g one plant in soil, with work castings, I have flushed her but seems to be getting worse , I flushed her with spring water, leaves look bad , happened in the last two days, ph level is 7.5 which I know is to high , she is very wet, I don't know if I should do another flush while she is wet ot not to try to get the ph lower, I'm running 600 mars hydro led. Please any help would be appreciated, plant was healthy up to 2 days ago then it turned.

Another leaf

Quit flushing to prevent exacerbating issues; allow it to dry out. Concerns about soil pH may be unnecessary as those meters are not known for their accuracy.