White coating on rocks???

[jackamo55]

Hi all , this morning i woke up and checked on the tank ot find that a kind of encrusting white coat is forming on alot of my rocks ? Anyone else had this or suggest what it is?

 

[x19]

Was their corralline there before? Coraline turns white when exposed to air for too long.

 

[jackamo55]

There was no obvious purple Coraline there but maybe some brown its there is such thing? The rock was exposed to air for about 30 minutes a week and a half ago ? Would this explain it ? Is it anything to worry about?

 

[Marines_Wife]

Coraline doesnt just come in purple. Purple is just the most common color, so what was there before?

 

[jackamo55]

The closer I look the more it looks likes light brown encrusting with pores in it , so im guessing it is brown coraline

 

[sen5241b]

Looks like dead coralline