The Ec values should be around 0.5 to 0.6 during week 1
, 2.2 /2.4 week 2 ( 18h of light ) , 2.5/2.7 week 3 , 2.7/3 week 4 (18 h of light ) then after you induce flowering with 12/12 light schedule and you use an Ec between 2.7 and 3.2 until the late flowering and during the 2 last week you use a 1.8 to 2 Ec . In flowering prefer to use 2.8 week 1 then 2/2.5 week 2 and repeat ( 3.0 week 3 and 2.2 week 4 )