help what is this brown stuff URGENTLY!!!

[zoidberg01]

Today I woke up and some brown stuff is growing on my rock . Is it because yesterday I added a cleaner shrimp and a bicolor angel ? Some of the bicolors water mistakenly fell on the tank. Will it harm coral or fish?

 

[zoidberg01]

 

[zoidberg01]

it kind of looks like algae

 

[zoidberg01]

 

[zoidberg01]

P.s. it's not live rock

 

[flower]

Hi,

It's caused by having...a new tank, and the brown algae will go away on it's own...or...get some hermit crabs, they love brown algae.

 

[silverado61]

Is this the tank that has the anemone in it?

 

[zoidberg01]

No it does not have a anemone but it has like three hermits because I find the nerite shells ib my back yard

 

[zoidberg01]

It happened to my 55g but not as fast as this one