So it will probably caused at first to low pH in the root zone (5,5), when I have found this out, I have left it for 3 day to let it dry a little bit and than (me idiot) I have adjusted pH to 6,15 by adding pHed water to 6,9 but without any nutricient only with 25% of additives and the girls are starving now...! I will go on with the feeding according to the schedule (80% was my last highest concentration of recommended dosage) but I wont to burn them down or make a shit full of npk when there will be no flush...???!?!