Shedding or too much light for nepthea?

[JZ199]

Wondering if this looks like my Nepthea is getting ready to shed? I'm hoping it's nothing worse. The only changes to the tank have been adding a new [more powerful]light about a week ago. I did a water change yesterday but nothing got out of the ordinary and everything is is doing well. (Green bubble tip and frogspawn)

*3rd picture will be how it usually looks*

I am currently battling what I believe or diatoms but not dosing anything so unless it's actually dinos, none of that should be effecting it.

 

[SPR1968]

I can’t help with the question, but I can bump the thread to see if we can get you some assistance