Well I am finishing up on my flush and was wondering what is a safe PPM to put my plants at. I was only using 450 before and apparently got signs of nute burn (see the previous posts in this thread). I even dropped the PPM to 225 for the last week and still was having yellowing leaves. So now I don't know if I should go up to 900 PPM or stay at the low 225-450. Any help would be greatly appreciated.

Thanks,

GrowerXLT