When I started out I was actually planning on gradually lowering it from 24/0 down to 16/8 but then I realized that I was just robbing the plants of their photosynthesis so when I got down to 22/2 I just switched it back to 24/0.

I couldn't be happier.

as for root growth, my babies needed to be transplanted due to being rootbound. I don't believe 24/0 slows the growing of the roots down at all.