Newer growth is yellow

[Mithweeds420]

4x4 tent with a marshydro ts1000, i have a ts2000 on the way aswell. 12/12 cycle starting this week.
Dwc system reservior outside the tent.
Ec 2100 Temp 23c ph 6.1
Inside the tent 30.1c 50% humidity. Its currently summer atm doing my best for a cool breeze.
The one on the right seems to look happy but the left looks like its lacking, they are running on the same system, the pot on the left is at the end of the feeding line could that mKe a difference, sorry im new to indoor growing.

 

[Canada_420]

Looks like the result of an overwater, turns into iron defiency because of a ph swing as the water sits

 

[Mithweeds420]

Thanks for the reply man, im in roughly 30% clay on the bottom and 70% coco perlite on top. Watering every morning 2 hrs after lights on for 15mins, water level in the bucket just submerges the bottom of the clay. Should i be watering that often? What do you think i should do..

 

[Southernontariogrower]

Are those spots necrotic?

 

[Mithweeds420]

I havnt come across anything that could do that sort of damage to the leaves, only the occasional white fly. So im thinking it was done early stages when i was training with garden wire, is thats what your talking about? The fan set on the left plant next to the sticky trap

 

[Mithweeds420]

Are those spots necrotic?

Not to sure what this is from, the fan blows directly ontop that spot. Could it be wind burn?