Big Bang Grow by Grecco week 7

So the big lady to the far left is in her 7th week, middle plants in there 3r week, and the ones far right are in the 1st week. Giving the big lady 1300ppm at 5.5ph the middle ones are given 1100ppm at 5.5ph, and the younger ones are given 900ppm at 5.5ph all in #4mix soiles medium. The small ones are in 3gl grow bags, the middle guys are in 5gl buckets, and the large lady is in a 20gl container.