6.5 is a little too high,also by now they should be able to handle 2000 or a little higher ppm,but i think it's the "ph",try to it lower to about 5.5-5.8,that will make most of the nutrients a little more accessible to the plants....bonbon
bonbon Reviewed by bonbon on . tip burn and necrosis have 20 K-2 in an E&f tray, im 5 wks into flowering and i start to get tip burn and necrosis ph is 6.5 and ppm is 1980, has been a good combo for the life of the plants so far. but i think it might be a nutri prob. btw 2nd grow with this strain but first with e&b table . any ideas. Rating: 5