What’s on my rocks?

[Afarouki]

Tiny white spots seem to be appearing on my rocks. They’re increasing as shown in the pictures.

What could be the reason? And is it something to worry about? Everything else in the tank looks normal

 

[Afarouki]

Tiny white spots seem to be appearing on my rocks. They’re increasing as shown in the pictures.

What could be the reason? And is it something to worry about? Everything else in the tank looks normal

Pics are only a few days apart