GMSgrowsanswered grow question 4 years ago I start early flower at 1.2 to 1.4...1.5 ec should be ok for early flower, a little high for me to start. I seen your diary and all the different nutes, wow. Recommend DNF Dutch Nutrient Formula. Made specifically for hydro grows and is very effective. All I would use when I grew RDWC. Also best to have ph up, keeps ph pretty stable. Cheers