Quote Originally Posted by GrowerXLT
I change my res every 7 days.

The roots of the sevierly stunted plants havent even grown out of the 3 inch rookwool cubes that are in the the 3 inch pots.

The good plants roots are a white/tan color.

GrowerXLT
Do the roots of the sick ones smell?
Or more like does the rockwool smell?

Are they all the same strain too?

You could be dealing with plytherwilt. It's common in Rockwool, there is an art to growing with it.

What is your water schedule again...I'm sure you answered somewhere but this great thread is to large to read. I just don't have that much time this month. (not that your post is that long) I just have a new project that is taking all my time right now.

I will stop back tomorrow AM and see if I can offer you any advice. The CalMag Plus was a good thing to add.