Alrighty here is my problem: I have a hydro system, 10 gallon tub (6 gallons filled), currently at 500ppm, 400w HP bulb. I had 3 clones; one died. Out of the other two: One is doing AWESOME and the other is not. I was told that the strain is "Purple"; don't know more than that. So far I am at day 18 after receiving clones in rockwool. Pics: Compared: Good: Not so good: Good roots: These roots are trying...growing a little more each day: The full system as a reference: The bigger one is growing more and more everyday and the other one continues to keep it's yellow look. I assume that the spots on the leaves are from the light burn. I have been misting the leaves on the smaller one in hopes that the roots would grow faster. What should I do? Is there a nute deficiency? Should I just let it grow and see what happens? Let me know! Thanks! EDIT: Just changed PH from 6.7 to 5.9. PPM is at 495.