Yellow leaves with spots

[TUF]

Welcome aboard Tuf.

This is just a guess brah.
So wait for someone who actually knows what they are on about before taking action, yah?
But, it looks like a Phosphorus lockout.
Is the main stem as red as the petioles?
What are you using to adjust PH?

We expect some yellowing of the fan leaf at 30 days, but those spots are not what I'm used to seeing.

There's a symptom chart in the archives here.
I'll go rat about and see if I can find it for ya.
BRB

Edit:
Text

Weezard

Thanks alot weez. The main stems look healthy and stink nicely. These leaves were at the top of the plant. By the looks of the diagnosis charts its a k def. But i also see similar characteristics in most all the diagnosis chart pics.

Im using the botanicare ph products and aim for 6 and i dont chase.

Since i am out of town I am just having my caretaker top off the res with ph water (44 ppm out of tap) to keep it simple and treating it as a mid flower flush.
So its day five of this little escapade and ppms still maintain ~1000

hmmm maybe my pens need calibration but they are fairly new...