My best plant is sick, I have several home built systems, all in 5 gal. containers, have been having great luck until now. About 4 weeks in veg. ppm was at 600 this morning, ph is usually set at 5.5 because it goes up daily. Left for work this morning came home and my best plant was just laying down, gf said it was fine a few hours prior. I just made this new system yesterday and replanted into it, areoponics, with 6 sprayers, top feed with constant flow from 4 small drippers that stream. Any help would be great. Oh by the way my PH was way high when I got home, must not have waited long enough to mix this morning.