I use beneficial bacteria and grapefruit seed extract to fight root rot, temps are fine.
Also using mineral water which is supposed to have some cal mag. I thought flora series with micro nutes would cover cal/mag. Water temps are fine
Appreciate your help, i was worried that it was some kind of fungus or yellow spot virus. However, the spots are covering mist plants including another strain. Other leaves do show a bit of heat stress
DWC with hardwater, lava rock medium, flora series trio, temp around 24-26 celcius, humidity 40-46. A lot of airflow to manage high temps.
I actually did spray with Neem oil mixed with water probably too potent ratio.
PH between 6-6.5 PPM around 1,000.
5 week old white widow feminised autos.