Need ID.. Hydroid? Do they sting corals?

[buruskeee]

Please help ID, I’ve noticed these tiny dandelion things starting to pop up everywhere.

 

[Lucky Corals]

Yes they are hydroids and yes they sting corals. Powder foods like reef roids seem to make them spread.

 

[buruskeee]

Yes they are hydroids and yes they sting corals. Powder foods like reef roids seem to make them spread.

dangit. I don’t feed anything besides pellets and flake food to fish. Haven’t fed coral foods because still at the tail end of a 6 month battle with dinos. I've heard the only thing to do is a dewormer/fenbendazole