Hydro......nutrient film technique

Some colas are doing that shit foxtailing but otherwise getting fatter by the week. Only done half strength feed and a little pk to top up the tank...I think i should have waited til this 6th flowering week to start the pk as these are going to be a while before they are ready Really pushing the EC level to its limit as the tips are starting burn....the ec is flashing on 1.6, soon as the water lever goes down I'll piss the strength down with clean water