how to kill small white star fish

[Big E]

If those stars get to plague proportions they will eat all your coralline in fast order. Siphoning won't put a dent in them. That's when you have to resort to Harlequins. Just be responsible enough to keep it fed or find a home for it so it can survive long term.

The times I've seen population explosions is when there weren't other grazers for the stars to compete with.

 

[augustasalty]

harlequins. if you want to keep these shrimp long term, throw a couple chocolate chip stars in your sump, take a leg from one, then the other and they will regrow them, if you rotate them like that, by the time you harvest the tenth leg, the first will be regrown.

 

[ludnix]

I allow my asteriina star population to go unchecked. I have never seen one eat coral or coralline and at worst you can always pop them off the glass with a mag-float. They usually will balance out after their food source starts to diminish.

 

[LobsterOfJustice]

I had them for about 4 years no problems. Then I must have introduced the bad kind, because they ate SPS. Added a harlequin - a few weeks later, no more coral issues . Passed it on to a friend, then he's going to give it back to the store.