Yellowing leaves, purple stems, burning leaves

Hey there peeps. I’m in need of some assistance. It’s my first grow and I’m not sure what’s going on and how to fix it. I have two Gorilla glue autos. Both about 2 months old and super small due to lack of light. I got my new light then this happened. I’m thinking zinc deficiency in the one with the pale yellow leaves and burning. Maybe a magnesium deficiency in the other. Both plants had a low ph run off I flushed until the ph can out to 6.3 a few days ago. Can anyone help my pin point the issues. Any help is appreciated.

Over watered, under feed and either not enough light or light shock/to close.

Cool slippers.

Purple stems can be caused by watering with water temp much colder than room temp
I store water in the tent overnight before use = no shock