Spots like burn but i have nt put much nutes in at all .??? Lil yellow and sick looking

[Natkingcole]

I noticed theese spots on the edges of my leaves and bottom little leaves turning yellow .kinda outside the veins I feed 1/4strength ff to bout 6 weeks .7 in

 

[Natkingcole]

This what I'm dealing with ...in ff soil happy frog with a lil of .trio at 1/4 strength bout 7 weeks deep

 

[growsince79]

Root rot.

 

[CF89]

7 weeks????? My plants look like that after 5 days and I’m only on my second grow with cheap led lights.

 

[Madmax]

First thing i thought was over watering..