is this a deficiency

can anybody tell me what this looks like. i dont think its a burn more of a def but i am no expert deficiency. its on the older fan leaves at the bottom of the plant. my ph is at 5.8 constantly and my ppm is 650. i mixed my solution of gh nutes 1-1-1.

That's the same problem I have. My leaves looked like that before they went like this:

I got some suggestions in my thread but noone's posted in it for a while....

https://www.rollitup.org/general-marijuana-growing/134711-trainwreck-i-think-theres-something.html

I think you need a nute with more nitrogen, 1-1-1 isnt enough

atcjon-looks like classi cmg
rununky-agree with more N, but also looks like codeficiency of mg

Give it 20-10-10 soluble nutes.... and just for this time add 1 table spoon of Epsom Salts per 1 gallon of water. If you give it too much E Salts you can burn the plants.

Hmm having the same problem here. I have just started using a 4.8 1.8 4.3 Mother Earth Blended natural Super Tea as recomended by the local hydroponic store

Here are some pics