Some symptoms I need help with diagnosing - Young veg

[Jwhat201]

Ok I got two plants in young veg. An OG kush and a Great White Shark.
Both are showing kind of the same symptoms, lower leaves and middle leaves yellowing/rusting and the edges curling right down. The top leaves look fine until a new nice set comes in then the lower one starts doing this. I tried feeding a bit of nutes I don't think it did anything. They're in a promix potting mix that I haven't used until now. Could the ph be off, causing this? I got no meter or any buffers so my only fix would be to transplant to my other soil that my previous grow did great in.

Please and thank you for any ideas please keep in mind I have nothing for ph but I'd really like to know if that is the problem haha, or what it is.

I'll post a couple pics soon

 

[Jwhat201]

Re: Some symptoms I need help with diagnosing, young veg

Pics the bigger one with 4 tops is the og.

 

[Spydr]

Looks like mine. I overwatered and this is what happened. Basically my pots are to big for the plant. Add quick release nitrogen and boom nitrogen toxicity. I have removed mine from the soil they were in and flushed em. Put them in new soil with no added fertilizer. Still waiting on the results. But if you have good dirt already that you know works go for it.