@ RJ, I hate to say "too late to fix," but you might be able improve the plants finish. Honestly IMO, I'm not sure if it would be worth it. That girl looks to be in week 3-4 of flower. Your best option would be to just do a water only/semi flush, (make sure your PH is right) or better yet, test your run off first and if the PH is out of wack adjust your incoming water accordingly, and then see what happens. Don't drown it over several days. Do a good semi flush and let her dry out.  Have you checked your notes from  the beginning of the grow ? Please say you have notes...he,he,  Peace   Oh yeah I forgot, next time try to diagnose the plants health earlier by being very observant. You'll get it !!