Yellow spots in coral

[savannafish]

A couple days ago I noticed one yellow spot on one of my dead corals that I got from my local salt water store. I didn't think much of it bc my peppermint shrimp and hermit crab that's currently in there have not been effected by it (they are cycling the tank). I just noticed today after school that the spots have gotten bigger and into other coral and even the glass. My levels are fine which is weird, is it harmful?

 

[bribo12]

It looks like diatoms which are part of the cycle. They usually rub off super easily. Just wait the sand will get a nice dusting as the tank reaches the end of its cycle

 

[savannafish]

It looks like diatoms which are part of the cycle. They usually rub off super easily. Just wait the sand will get a nice dusting as the tank reaches the end of its cycle

Ok so it is nothing to worry about? Because tomorrow morning I am leaving to go to the other side of the country :/

 

[54seaweed]

you"ll have a surprise when you get back .
good circulation can help keep it to a minimum but yes it's normal in a new tank,

 

[savannafish]

you"ll have a surprise when you get back .
good circulation can help keep it to a minimum but yes it's normal in a new tank,

Ok thank you!! Haha yea I read a little bit about it online and it said it reproduces pretty quickly[emoji51] hopefully the shrimp and hermit crab will eat some of it