Colonial Hydroids

Thriving colonys

How do I deal with hydriods? I’ve tried coral RX and toothbrushing it but nothings worked. (Not my photo but looks identical and placement of being in the polyps is the same may even be the same Zoa type)

Any idea what these little clear tubes are coming off my dead favia skeleton? They’re multiplying… 😬😱

Found these clearish tube with tentacles things coming out from under my rock, I remember seeing them somewhere but don't remember what they are any help would be appreciated.

HELP!! What is this thing? It’s so small and on the glass it was so difficult to take a good picture. Is it a hydroid? How should I get rid of it? Thanks!

Not sure what this is. First I thought early aptasia. Now im being told on Reddit it’s possible colonial hydroids. Have been recommended getting a flameback angel but know nothing about them. And at $250 I kinda want to be sure I know what it is. Appreciate the advice everyone.