Yellowing/browning leaves

A question from a fellow grower:

this is an ak47 autoflower I have from u guys that’s growing in a cash crop 4.0 box. the tips on the bottom leaves are yellowing/turning brown. the plant is 2 weeks old and it seems small for a 2 week old plant. any tips/suggestions on what is going on and what to do?

Strain; am 47 autoflower
Hydroponic system (dealzer cash crop 4.0)
PH of runoff or solution in reservoir? NA
What is strength of nutrient mix? EC, or TDS
Indoor or Outdoor
Light system: two 75W light bulbs on one plant
Temps; NA
Humidity; NA
Ventilation system; Yes
Co2; No

from the looks of it, it looks like potassium deficiency but I’m not fully sure.

Best to start with the pH, which is “not available”.

Get a pH meter or pen, or pH test drops, or litmus paper for a reading.
In hydro, aim for 5.8

Nothing; you have nutrient-splash !!