Tiny Featherdusters On my cured live rock?

[jayball]

Hey guys,
I just started my reef tank a week and a half ago and I have a few questions I hope you guys can answer!
First off, I have these little white things (I don't really know how to explain them) that are on my cured rock. I have approximately 4 of them and I have no clue what they are, any ideas?
Also, my salinity level is 1.0275 and I don't know how to lower it to a salinity level good enough to put fish in.
Please help!!
Thank you

Generally speaking you should make your own thread...

For the ID, post a picture in the hitchhiker ID sticky thread, someone will let you know.

For the salinity problem. First make sure you are at your normal water line either in the DT if you are sumpless or in the return compartment in your sump. Make sure you have been topping off with fresh water only. Last make sure you are measuring accurately.
To fix it just remove a little salt water and replace with RO/DI water until you get to your target salinity.

 

[YummyMummy]

Hi, thank you for this thread, I found a couple of these on a mushroom rock and they are only a few millimetres in diameter, do you know how big these may get and how quickly they could spread? I really like them but have to struggle to see them so would love them to get a bit bigger if they're harmless. Thank you

 

[davocean]

They stay pretty small.
I love those things, used to have them on my rock but a copperband ate em all up.
My new tank will not have a CBB, so I plan to have feathers of all kinds

 

[YummyMummy]

That's a shame, they are pretty cool, maybe they cover a rock then instead cause that would look pretty good. I might look into getting a larger one from my lfs. Thank you