Hey 
@gmslave you may have actually answered the question I have out there about my grow.  I have light green leaves on a 3 day old seedling and was wondering why.
I was targeting my ph for first two ferts at 6.2 ph for CalMag absorption because I don't know if Mother Earth is pre-buffered for CalMag.  Tonight she gets 5.8 ph target. I think this is what is happening to mine and your comment helped me see that.  Thanks.