auto gelato

The attached images are from one of four Gelato autos that are in day 23 (since germination). The leaves started showing signs of having an issue a few days ago. Only one plant is showing symptoms and only leaves that are being impacted are the lower leaves. The grow environment is detailed in...

This is my 2nd journal. I have been growing since 08 with a couple years in between. And first time growing autos. Going for 6 autos. So as I go any input will be considered. My set up is: 4x4x80 Vivosun Vs1000 Vivosun 6" inline fan and carbon filter 5 gallon fabic pots Fox farm Happy Frog Fox...