My friend, you won't get much worthwhile advice with the information provided.
I'd advise you to fill out the troubleshooting form.
At the least, the act of filling it out may help you diagnose this yourself.
Also shows that you care enough to put in that effort.

Might even be able to help you with this myself, but at this point it would jus' be a wild assed guess.
And that worse than useless, yah?

Aloha,
Weezard
Weezard Reviewed by Weezard on . Yellowing Leaves.... What exactly is the Problem? Hellow Guys. I have 3 Blueberry, 2 White widow, and one afghan plant growing in my 6 Bubbleflow Bucket Setup, Basically a constant flow DWC System. This is the last week i am Vegging them Before switching to Flowering. 3-4 days ago I flushed the System out and increased my Nutes. I am using Technaflora Recipe for success. The last Batch of water was about 900 PPM, The Week Previous to that 700PPM. The last change I did i went up to 1200PPM. My pH is constant around 5.8. My blueberry Rating: 5