HELP! What am ı looking at?

[genghishan]

Hello there
I changed light cycle 12/12 4 days ago. I check ph and already ı use ph perfect nutrients. Not overwatering or less water.grow tent heat max 28celcius. Humidity 40-55%everytime. I have 4 pot 2 plants look like this. What is that? What kind of deficiency or burn?

 

[Rwise]

Look at the under side with at least a 30X zoom, see any bugs?

 

[OlderNOTwiser]

My best guess without seeing the whole plant or knowing anything about the grow. https://www.growweedeasy.com/cannabis-plant-problems/ph-fluctuations

 

[dilvish]

Looks like maybe an oversplash of nuted water. Unless of course it's happening all over the plant. Perfectly PH'd nutes mean nothing if the water you put them in isn't tested as well. Remember you add the nutrients to the water first, mix and then test the water & nutrient solution again for PH level as nutrients can change the PH of the water.

 

[genghishan]

No ı check under side to leaf but there is no bugs or eggs.

 

[genghishan]

Thanks your comment. But I have advanced nutrients sensi grow this nutrients when ı put the all nutrients I always last checking. Everytime same result 6,50 6,70ph. Because this nutrients do ph perfect.
Sorry for poor english