Aptasia ?

[tess&ellie]

I have this which I’m sure is an Aptasia it’s on a removable rock with green star polyps any great suggestions on how to kill it 🤬

[IHaveADegreeInMarineBioBut]

If it's still small enough, take the rock out from the tank. Get super glue gel that ONLY contains cyanoacrylate; a lot of people say that Dollar Tree has a good cheap one. Put a dab of that gel right on top of the aiptasia. Give it a minute to set and then put back into your tank.

If it's too big to encase with gel, look into aiptasia x, lemon juice, or boiling water methods, or natural predators if your tank allows, such as peppermint shrimp or file fish--though these should be as a last resort because they're more likely just to eat your corals. 

[tess&ellie]

Thank you for your help

[mcarroll]

Surprised you didn't run into this on a search:

Watch a video on how to use it and you'll be fine.

 

Post a pic if there's any doubt that's what you're looking at.