What is this?

[Arom0024]

New live rock in tank. Anyone know what this is? It grew overnight.

 

[Arom0024]

 

[Mike_J]

aiptasia anemone

 

[Arom0024]

Sorry I'm new is that good orbad? I just put this live rock in yesterday

 

[helen ann]

Bad Guy!!!

 

[Arom0024]

Uh oh how do I get rid of it

 

[FLAdaboy]

If you want to go natural, there are fish that eat aiptasia as well as peppermint shrimp and berghia nudibranchs. If you want to use products, I would use aiptasia x.

 

[Mike_J]

https://reefbuilders.com/2016/08/23/how-to-eliminate-aiptasia-in-aquariums/

 

[Saltine]

If the tank is that new I'd dump the rock and start over. If it was live rock there are bound to be more that pop up. I'd start with dry/dead rock for this very reason.