Any idea of what this is

currently running super silver haze and king tuts there in there 3rd to 4th week of flowering some in second week ... have a few spots on a couple plants show up that leaving me iffy , definitely never been good at identifying issues of such ....

Most of which were it's taken place starting 6inchs to a foot. Below the tops

Temp is 79
Humidity 55%
Lights r air cooled
Plenty of air movement
Been feeding around 850 to 950ppm
Ph in and out has been 6.2 to 6.5
2x 1000w hps

What are you growing in?

Because what i think i am seeing is some lockout due to salt build up in the medium, quite possibly. What might be locked out is harder to identify...

But... if its just a few leaves here and there in a couple plants and its not spreading on those plants then maybe it isnt worth worrying about. A little necrosis here and there isnt uncommon

Fox farm ocean forest and happy frog with added perlite ,
GH flora dua a and b
Floralicois plus
Diamond nectar
Koolbloom
Extreme gardening mykos and azos

Doin a feed water feed water
When I water allow quite a bit of run off .. never have had this kinda issue. Before.. I did add some sand to top for a lil test but other then that have fed the same way

that looks like the damage caused by ph swings. the only other thing i know that looks like that is bad roots, and thats usually a hydro problem. it might be potassium....are you seeing any of the damage get reddish/coppery before it turns white?

No not that I've seen yet .. I check my ph run off on a reg . There using water quite regularly like normal .. I guess I'll do a 6.8 watering and the second go with a light dose of nutrients or what would y'all recommend ,

kinda swingin blind...it shouldn't be from ph fluctuations if you stay fairly close to the same ph,
if it was root problems it wouldn't be spotty damage, it would be all over the plant.
potassium problems are sometimes caused by over watering. they don't really look over watered, are you letting them dry out fairly well between waterings?

Yeah not dry dry dry but they usually go 3 days .

honestly, they're in flower, approaching the end of their lives, i wouldn't be enormously concerned unless it starts to spread rapidly. if it stays about the same, meh. if it does start to spread rapidly, i'd do a flush, then go to half strength nutes and see what happens, but you don't really wanna be flushing in flower if you can help it

Kinda what I was leaning toward , which when I water I usually do lil heavier then some . Would to much mollases cause this issue , I haven't increasdd the amount of times I use it just stepped up the dosage

it shouldn't cause that. are you running beneficial microbes? i know its a long time thing, but in reality, molasses doesn't really do anything to your plant itself, its good for your benes if you use them, but as far as plants go, the sugars and carbs in molasses are WAY too big for the plants to use without them being broken down. would be like a 6 year old trying to swallow a whole turkey, the turkey might be good for him, if he could consume it. benes are like a knife and fork so your plants can eat that turkey

^just my opinion, and no, molasses shouldn't cause that....but the sugar and stuff in the molasses may be causing some kind of bloom in your soil, i think i'd maybe use a little h202 the next couple of waterings, wash out anything that might be eating that molasses and shitting bad stuff on your roots.
10ml per gallon ought to take out anything that shouldn't be there

thanks for the info everyone , imma try a good water and a light round of nutes see we're that takes me and go from there . I've started using mykos and azos on my next clones comin up and my new mothers