spotted leaves not sure whats wrong?????? (pics)

my plants look pretty healthy except the leaves look like this



even the new sets come out with spots on em.
my ph is running at 6.3 ppm 900 2 week into flowering. watering once a day with a top dripper ebb floww pott system. any ideas be much appreciated.

I just found the same thing on mine (no joke like 10 sec. earlier), not nearly as many and only on a few (2 per plant) of the bigger fan leaves. My guess is some micro pest got in and is trying to do some damage, but just can't get a grip (at least on my plants). I wasn't going to worry about it and just keep an eye on it, but yours looks like it could be a problem, might just be a nute issue, I got a book and will post after I read it tomorrow

Kovo what are you feeding/growing in?

it does look like a minor ph fluctuation.
The only other thing I know of that seems to cause that specific look is swapping between artificial and natural light, which given the precise numbers you have I'm guessing isn't a issue here...

I don't think pests are to blame.

Mortloch said:

Kovo what are you feeding/growing in?

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i'm growing rockwool cubes in hydroton in 9 litre pots! feeding them HY-GEN growth formula NPK:26.11.36 ppm 900

White flies, at least that is what your pictures matches to the one I found in my book. Like I said I have a few spots but nothing to worry about, but it did say if you have white flies that when you shake the plant you'll see them fly up and land back down on the leaves

i think your right man just looked up white flies and looks exactly the same dam gotta get rid of these fukers!
cheers

Oh and so I give credit where credit is due the book I am getting my info from is called " Marijuana Garden Saver" by J.C. Stitch Edited by Ed Rosenthal

keep the room under 80 degrees and install a dust filter, and get yellow sticky pads because they like yellow

kovo said:

i think your right man just looked up white flies and looks exactly the same dam gotta get rid of these fukers!
cheers

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no problem, at least I know what I got to, but I'll let the plant fight it, unless mine spreads

yeah mine has spread threw out the whole crop 9 plants and their only a 3 weeks old so they spread fast! yeah i'l get some sticky pads and see if there's any spray available.
i had them all over my last crop aswell i didn't know what they were and i still harvested some killa buds so lucky they dont destroy the crop.