Clove Polyps

[skabooya]

Those were the ones i was talking about. Those look like ice blue cloves but the pic is kinda dark so its more difficult to tell.
In any case, Ive read that they can be killed by starvation (keeping trates very low for a long time), scrubbing them off constantly, putting a stinging coral around them, using kalk paste, boiling water when out of the tank, sometimes pep shrimp eat them aparently.

Just tossing around things ive read about cloves