GDP Grow: Yellow tips on only new growth. Any ideas?

Hey everybody. I had this yellowing of the tips come up within the last 24 hrs. I've never had this before. Anybody have an idea of what it might be? They were transplanted from 2gal into 10 gallon roughly 2wks ago and they've been watered and foliar with a compost tea once about a week ago. I've only given them water other than that. They loved the transplant and compost tea application. I was thinking possibly it is a delayed burn from the soil amendments, but that's quite a delay. I use tap water that I let sit for 48 hrs. I've always used tap. I live in the Mtns and my tap tests at about 70-80ppm. Ive never had a problem before that is caused by my water...This is Granddaddy Purple. Thanks for your input

Here is a picture of their growth in ten days from transplant with one tea application

Nice toes bro


Lovely lookin plant man. That is a little weird cause it doesnt look like its burned, just yellow....id say maybe a ph thing. Thats a pretty pronounced purple color on that leaf stem.

Yeah this GDP is a potassium/calcium/magnesium fiend. There's no purple on the main stems just the leaf stems. Only her new growth stays all green. After she gets a few new nodes her older leaves stems start to turn purple. I was going to brew her up a kelp/molasses/guano tea but hesitated when I saw the yellow tips.

Well, whatever it was, it has corrected itself. no yellow tips on the newest growth.. that was strange