Brown spots are killing my plants!!!

[420ps]

Hi,

I have a small problem with my plants in the begining there were some small spots appearing on the leafs and now it has spread on the whole plant.... i flushed all plants soil yesterday and i checked the ph its about spot on 6.

I use Hesi soil kit and follow their scheme, the plants are 24days old from seed.
They are under a 400w hps with around 28-32C temp 30-50% RH.

The 2 different strains are Kali Mist, and some spinoff on 'NYCD Diesel.

is this nuteburn or something else?

Please help my biggest kali is looking worse everyday, new leaves looks ok. but they get the spots pretty fast.

 

[420ps]

some more pics

 

[Moldy Dreads]

Seems like you are overwatering? Do you let the pots dry out and is there perlite in the mix?

 

[420ps]

yes i have about 15% perlite in the soil, do you think it can be because of overwatering i get the brown spots?

The "watery" leaves is because i sprayed them a few minutes before taking pictures, and i flushed the soil yesterday so it might give them a bit "overwatered" look. but as i am no expert i trust you guys more

The problem is that its spreading REALLY fast... 2 days ago the plant with allmost all leaves having spots had the one leaf (picture called start.jpg) spots.

 

[Moldy Dreads]

Let the soil dry out in between waterings, how often do you water? Do you weight the pots for heavy water accumulated in there? I only water like once a week under fluoros and maybe 2-3 times with HPS in 1 gallon plants, even less in bigger pots..

 

[420ps]

i usually water every third day, but i always feel if the soil feels wet or moist first... but i guess it might be more wet down the pot than i can stick my finger..

The pots are 6.5L or i think 13galons? not sure of the US metrics

But ills slow down on the watering for a few days and see if the problem slows down.

 

[bendoslendo]

Are you sure about the pH? I had a very similar problem caused by pH. I wasn't pH adjusting my nute solution because the grow shop guy said I didn't need too with organics. When I started pH adjusting my nutes the problem slowed then stopped.