Does someone knows what this is please help

[marcoacontreras]

 

[NashobaTek]

Looks like a dying macroalgae, but I can't remember the name of it. The one I had was red until it died.

 

[marcoacontreras]

Looks like a dying macroalgae, but I can't remember the name of it. The one I had was red until it died.

So it’s safe to have it it suddenly started growing by itself I haven’t bought anything new in the last 2 years , that is why I’m surprise if it is safe I’ll leave it alone thanks.

 

[NashobaTek]

Yes it is safe if it's a macroalgae, it could also be a type of Coraline algae. Which is also safe.

 

[Anthony Kochevar]

Looks like a clump of micro feather dusters to me. Do the tops retract?

 

[r20crazy]

those are colonial hydroids. if it was dry rock they are dead, if not you are in for a loosing battle as they will be everywhere very quickly (easy check is if the tubes are hard, they are) I had to remove the infested rocks from my tank to eradicate them

 

[marcoacontreras]

Looks like a clump of micro feather dusters to me. Do the tops retract?

Yes they do I tough about it

 

[James M]

Looks like colonial hydroids

 

[MabuyaQ]

100% hydroids. Take the rock out of your tank, 'cook' the hydroids with a steamcleaner and scrape them off. May need a second treatment to fully get rid if them.

 

[vetteguy53081]

Hydroids also called cluster dusters which are filter feeders. They grab food particles that float by