375 PPM is to much at 21 days old? Why is this? because of his system? I thought he was starving his plants. My plants just hit day 14 and I put them at PPM of 600+ the calmag and other items on top. I think they are growing well. But maybe it is just the system I have, to why I can get my PPMs this high.

Res Change is tomorrow and I am sending them up to about 900 PPM.

These pictures are about 4 days old. Since then they grw so much I had to raise my lights.