Not sure the issue

[SirRogerRabbit]

Are you feeding every time you water? Do you have a ppm/ec meter?

I have been feeding just about every time. Kinda just reading the response. I have given 1 or 2 full flush just to rid any built up gunk.

 

[SirRogerRabbit]

Great Eye! It looks like that is the only leaf that is yellowing as well.

I've had a few that put out weird leaves haha and there's probably 5 yellowing on the whole plant