Day 49 - Auto AK (Female) advice needed.

Hey guys, Its day 49, checked in on her this morning noticed a yellowing in the top leaf.



Thats at the very top of the plant.

Any opinions?

could look like the very beginning of a Ca defiency

also look a bit pale green, what do you feed her ?

If it's only on one leaf I wouldn't do anything further then just keeping an eye on it. That looks minor and could be the result of anything from water droplets under HID to just handling too much. She looks lush otherwise.