Can anyone identify this stuff please.

[pchopkins]

Hello
I am fairly new and been in the hobby about 3 years, been going ok until this stuff showed up, the one pic is after 3 days of no night, the other is after about 30 minutes of the lights coming back on. it is on my rocks and the overflow as you can see, my parameters are all in the normal for what I have been told by my LFS, the only one that is high is my nitrates which are around 30, I am dosing BRS 2part. any help would be greatly appreciated.

tank 250 gal

mg 1350 tested with salifert
calcium 421 tested with hanna
alk 10.2 tested with hanna
No3 30-50 tested with salifert
Po4 .o3 tested with salifert
amon and nitrite 0 tested with salifert

thank you

 

[Misled]

They look like colonial hydroids.

 

[Sugar Magnolia]

Bryozoans.

 

[mcgyvr]

Bryozoans.

yep

 

[pchopkins]

thank you, now to figure out if there is anything that can be done to get rid of them or if there harmful.

 

[mcgyvr]

thank you, now to figure out if there is anything that can be done to get rid of them or if there harmful.

They likely aren't doing any harm and are just a beneficial filter feeder..