Green Gelato NFT

Hello here is my first Diary!! on green gelato it's always a pleasure So for the beginning : I soaked for 3-4 days my cubes of rockwool at ph 5.8 _ at the same time I germinated my 5 green gelato seeds! _ Not too much light this first week they are under the led sf-1000 at about 40 cm and receive 10 000 lux I let my blocks soaked every 3 days in a solution of formulax ph 5.8 at 2ml/l and my tap water is very hard it is at 600 EC

This week I decided to put my plants under the SF-4000 from spiderfarmer at 50cm at 50% brightness (consumption 215w) 25 000 LUX The green gelato extends from day to day without suffering, the roots appeared two days ago I use for the moment only formulax with a tap water which is hard 25 000 LUX

This week everything is going well, still in the rock wool cube so she can't express herself 100%. Soon in the final NFT I used root simulator but I think I stopped on this one because the roots become brown at the tips the 18/05 put in place in the definitive tank EC=780 because trace of burning at 1200 Ec Growth slowdown, I think I overfed it just before I put it in the tank... Some signs of carance or burns ? I don't know . In this tank I am testing FRANCE HYDROPONIC fertilizers with : Rhyzomass Hydro a and B Bud excell about 1 EC like before when everything was fine

I don't think I rinsed my tank enough and the growth slowed down because of the bad tank... I hope it will start again soon! I also cut many brown leaves