Hi all,
I have an issue of some kind and don't know what I'm looking at.
A brief description of my setup and a problem :
Unknown strand, cloned
Soil : very good quality, used before
Lights: 180w LED, 6x18w T8
4 weeks + 2 days into 12/12
Temp: 28,5* C day, 21* c night
Humidity : 40-45%
Ph: cca 6-6.5, analogue
Ferts: none until week 4, then organic algae mix, molasses, organic amonium, amino+vits in grow
Flower: P-K, 28-26, organic, +molasses+ amino+vits
Week 5 grow-until week 3 flower : 3-4 times / week, foliar feed, microelements
Since 10 days ago, lower fan leaves first yellowed, then dried and were easy to pull of. Now, upper fan leaves are getting pale green, yellow if you will... new growth seems unaffected, although I recon it may have looked better. And I wonder, WTF? The affected leaves are firmly in place, yet look 'exhausted '. What is wrong with my babies? 2 out of 4 look hit, other 2 are in much better shape...
Ph is measured by approximate scaling, yet I'm constant in doing it. I flushed once when switching to flower. So far, no issues at all.
Pics attached. Please help!