My cs takes about 2 days to brew. I can get it up to about 20ppm and it is pretty yellow at that point. It also really hurts the leaves after several applications at that strength. I would suggest using a lower PPM and applying more frequently if possible. 12 to 15ppm should be fine if you apply it at the right time in the plants development. Once the plant is actively flowering, its much harder to reverse in my experience. Currently I have a plant that I started spraying earlier and its got lots of ballz, took about 2 weeks to turn it tho.