Torch Coral issue?

[DesktopReefer]

I've recently notice that while my Torch is staying extended and seemingly happy its stalk/stem is turning from orange to white. Is this normal or an issue?

 

[evh5150]

How is your calcium level

 

[cjk76]

You have an orange torch? Is the tissue moving up the stalk because new bone was created?

 

[DesktopReefer]

Calcium is 420, sorry I don't know the exact phrases but the actual tentacles are green, the stem just before it splits into the heads is what is changing colors

 

[LAKEM0NSTER]

Is the tissue moving up the stalk because new bone was created?

I've seen this before on mine as the stalks start growing longer.

 

[DesktopReefer]

I'm not entirely sure, it appears to be happening more and more, turning into the white color. Is that a sign it is dying? The tentacles and water parameters are fine :/