Samoa Kush DWC with Electric Sky ES300

So much for scrog....let things get out of hand, but it was difficult with these various phenos. I have 2 sativa leaning phenos that got pretty tall #2 and #4. The #1 pheno is super indica leaning and is short. Unfortunately, it's being overshadowed by the other phenos. Since these are all in one reservoir / tote, I could not move them around to get more lighting. #3 is so far my favorite looking pheno with tighter node spacing, purpling, frostiness and medium height, as it stretched almost the perfect amount compared to the others... which is 2x. Some purple calyxes are starting to appear....loving the how they are starting to look. I'm keeping PPMs around 520, but they are rising consistently. Since this is my first time doing DWC, I felt concerned I wasn't feeding enough...but I'm going by what the plants are telling me. I think I need to reduce the ppm as we progress further into flower.