End of flowering week 7, enough with the Overdrive, so nutrients are now off. Primarily because plants are finishing, so they need minimum 1 week of pure water. Also, it seems that there was little bit of nutrients burn which has now come to light, but not sure is this from it or from strong light-burn. But now it's not a problem anymore, essential is that the flowers themselves are not burning and that there is enough time left to be flush properly.