ID please?

[Bry17nyc]

They are really tiny

 

[Levito]

looks like hydroids to me.

 

[Bry17nyc]

i have aaaaaaalllotttt of those reallllyy tiny stuff... that's not actually my tank.. that's just a picture i found on Google...but their tentacles are not that long and i cant take any pics because again they are too tiny

 

[cowfish]

Hydroids

 

[Bry17nyc]

are they good or bad? everytime i built up a tank.. they appear
how can i get rid of them?

 

[TheFishGuy1984]

i have aaaaaaalllotttt of those reallllyy tiny stuff... that's not actually my tank.. that's just a picture i found on Google...but their tentacles are not that long and i cant take any pics because again they are too tiny

From this description...Sounds like aiptasia.

 

[Bry17nyc]

they say hydroids are found on rocks but this little things are on my overflow glass

and they never grow they stay that size
idk if theyre good of bad