what is this? dust from clay pellets or a threat to my angel?

Picture speaks for its self.

There is no picture..

If you didn't rinse hydroton before using it and it is reddish then yes

Oh Snap! Sorry guys, I was on my phone and the picture didn't upload. Uno Momento El gromos!!!

I know it's kind of hard to see it, but it's the reddish on the inside. I'm trying to tell myself it's nothing, but a professional opinion would be much appreciated.

Looks healthy to me! Do you mean that tiny intersection in the center where new leaf growth will come from? Should be okay. Give it a couple of days, and you should just have new growth from there.

Dang, I hope so man. Scared the dickens out of me. I've been googling everything about White Castle and shit trying to find out if it was a common issue. I didn't really think it was a deficiency where it was so early on and it's just living in rockwool as I wait for the roots to appear. I gave her her first nute bath tonight in a 30-40% strength solution. Should be good. Let us all join hands and pray.

Looks good to me. Picture in the middle is a little fuzzy but the new set of leaves look fine!

Cheers
- SB -

Legit! Thanks guys! Really appreciate the comments. Makes me roll with a bit more confidence! First time doing Hydro instead of bag seed/outdoor. So I am very cautious.

Lol dont worry to much it looks healthy

I use normal spring water. ph balance it and then use cns17 at 40%...should i add cal/mag to the water too? and perhaps H2o2? Or will my plant be happy in what she has. She began getting a little yellow on the inner leave. I moved the light an extra 3" away to see if that will fix that. God I miss good old soil....lol