Just an example, i had a plant a while back that i thought was an autoflowering type, so i kept feeding very low and just once in 4 weeks, and it was starving, but i didnt know what the issue was, i think it was my 3rd grow. I saw by week 6-7 that it was not an autoflower, so i gave it a higher dose of stronger food (25-10-10) at the end of week 8, the night i put her into flower, and within days she was new and 2 weeks later, she changed completely! I had no ppm meter or ph, just measured out some fertilizer in the cup provided, and went from 1 ml to 5ml i think, i thought i was killing it with that, but the way it was looking, i figured i have nothing to lose lol. Yours is not nearly as bad as mine was, but it goes fast, especially on a bigger plant!