Can anyone tell me whats wrong?

I have leaves turning yellow and then going brown and crispy is this normal? I have pictures. can any one give me some help with whats wrong and what i can do?

....looks like you need some calmag. or possibly overwatering.
...what is your soil/less made of?
...what is the pH of your runoff?
...are you giving them chemical ferts?

I have 2/3rds oceanfloor potting soil, mixed with, 1/3perlite
I have not measured the run off, wasnt aware i should will start doing that, but it runs at 6-6.5 before i water
I use the foxfarm trio for my fertalizer, the growbig, tigerbloom, dont remember the other one
I water about 1.75liters last and it was almost completely dry prior...oh i think they are 3gallon pots

Also if this helps They are 6.5weeks into Flowering, and i had too stake them up tuesday night could i have damaged the roots? i didnt think 1 little stick would cause something like this though.

Its a leaf blight fungus

let me guessing your probly just a few weeks into flower ? your ph is off

Do you really think its a fungus? should i cut off the leafs and remove them from the room? Ph stays around 6-6.5

Kinda looks like a nutrient burn on a few. But Id hack that one really nasty looking leaf off

cool will hack it off and flush? iguess only solid advice ive gotten so far

Is there anyone else with an opinon?

prebs said:

Kinda looks like a nutrient burn on a few. But Id hack that one really nasty looking leaf off

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I back this one up, looks like nute burn, cut the nutes back like 50% in concentration, but with the same ratio.

I tested off run off waters ph when i flushed them it was at 5.07, Do you all think it is still might be nute burn?

sivaskunk808 said:

Do you really think its a fungus? should i cut off the leafs and remove them from the room? Ph stays around 6-6.5

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thats too high

yeah its a Phosphorus deficiency maybe some calcium nothing more than that though for sho bro, no real bad issue get some eggshells on that fine biotch if your going organic if not check your nitro levels and add some bloom nutes and some cal

clean and sterilize your system and re calibrate you ph meter to make sure its on....that happened to me once and my ph meter was way off

nitrogen??

Thanks for all the tips time too trouble shoot