Help to identify the problem

Hi Guys, I really need help from you all

I'm currently dealing with this problem and it looks to be spreading all over my garden. Mature and seedlings are getting similar foliage spots.

Setup:
Lights 400W HPS + 250W MH
Soiless Mix: around 60% Coconut Fiber boiled and rinsed till runoff water is clear + 20% Organic Soil + 20% Perlite
Nutrients: Sensi Grow 2 Part PH Perfect by Advanced Nutrients

Bigger Plants are around 8 weeks old from seed and they had a really good start till around week 5, then I had to move them to different grow room which after a few days fully sealed had its humidity level SUPER HIGH and the grow room got completely full of Botrytis grey mould all over the walls.

I already washed and desinfected the whole grow room and the mould appear to have gone.

But plants are still showing signs of death despite good growth response at same time.

Not sure if it could be a type of Fungus or Disease.

Already tried many different things including changing soil from a few ones and they still sick.

Plants are at the first week of flower.

Instead of flipping to flower I would toss any ones that look the sickest.
then transplant the rest into some larger buckets
After they show a bit more growth (2-3 weeks)flip to flower. Right now the new growth on some of those plants look healthy but personally I would let them vegetate a little longer. The old growth will not recover from the damage.
if these are just regular seeds and you need to sex them I guess I’d keep flowering though

hope this helps!!

thats damage caused by underwatering,the light has damaged the leaves because it had no moisture to protect itself.just keep on top of your watering,this happens alot after youve just potted up and the roots havent filled the new pot ,you think they dont need water because the pots heavy still after a feed but infact the roots cant reach it

Better close up look até the sick spots taking over the plants

tiltswitch said:

thats damage caused by underwatering,the light has damaged the leaves because it had no moisture to protect itself.just keep on top of your watering,this happens alot after youve just potted up and the roots havent filled the new pot ,you think they dont need water because the pots heavy still after a feed but infact the roots cant reach it

Click to expand...

It could well be underwatering problems indeed. I did have issues with watering right from beggining due to high Air humidity level so i left It get bone dry for 2 weeks or more before watering again.

Im considering this foliage spots to be a fungus or any type of disease or even pest since im growing It in the countryside of Brazil

yeah it's hard to see in the pics...weed is pretty hardy takes a lot to kill it