Yellowing and spotting of leaves

[verysneaky]

Just wondering if anyone can offer some expertise.

The story is that these are from a few different strains, and when they were first put in and last week of veg through like the second - third week of flower the weather was making it a real pain in the a$$ to keep the temp down, Id say they got to the high 90s maybe even the low 100s. Other than that the PH is meticulous, the ppm is checked daily and using hydroponics with GH micro, grow, bloom. PH is run at 5.8-6.1, it broke 6.7 at one point for some freak reason .... but that was fixed one day later.

I honestly think that its just due to the heat over that period of time.

This one looks like Nute burn but not sure if its nutrient, PH or other

not sure

and im just lost with this

 

[CocoJoe]

Hi verysneaky, Are you? Have you got this problem fixed yet? Let us know.

 

[hydro-noob]

do you have any spider mites/

 

[drumlove420]

Hi Vs.. If it's just a few random leaves I wouldn't worry too much. If you're checking your pH and tds regularly, you can rule those out. Get a microscope or magnifying lens to check for the mites. If you see webs, you're real late to battle them because of the photo period. You don't want to spray too close to harvest. Leaves die all through the cycle, just keep a close eye that it doesn't get worse.