man you got me. Hope you figure it out. I'm assuming your ppms are 700--I'm not familiar with quick grown but I have some plants that really jumped in size one week and wilted within about 36 hours. Turned out to be a copper deficiency i believe---looked like overfert but the plants got worse and worse the more i diluted the nutes....mine started at 900ppm (Botanicare) and as soon as I upped the nutes to 1200 the plant came right back. 700 sounds kind of low to me after that experience..