Chojubai - yellow leaves?

I hope the photos upload to this post :crossed_fingers:
Anyway, I’m seeing strange leaf development on my Chojubai. They come in strong but mottled with red and yellow coloring. Red at the edge of the leaf and yellow in blotches. Since it’s happening all over the tree, I assume it is an issue with the roots and/or a lack of certain trace elements. I use BioGold and occasionally water with fish hydrolysate/kelp.
I really need the Mirai forum brain trust to help me!! Thanks in advance!

This almost looks viral but I don’t know if Chojubai has viral issues

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