Whats this?

[Jilly92]

It was in filter

 

[GillMeister]

I think that'd be a branching hydroid.

 

[vetteguy53081]

Looks like what is called Chondria. These and related species look like translucent plants with cylindrical and irregular branching. They may stick to surfaces like Chondria repens, or they can brachout like the bushier Chondria minutula. The important thing in identification is look how the branches have smaller branchlets, usually ending in a pit. removal is fairly easy.
While macros that have fragile runners and creep along the surfaces are the hardest to manually remove, this macro tends to peel better than most. Get the holdfast and attempt to peel it off the infected surface, if you miss any go back and polish it off with the tweezers or a dental pick.

 

[Jilly92]

Looks like what is called Chondria. These and related species look like translucent plants with cylindrical and irregular branching. They may stick to surfaces like Chondria repens, or they can brachout like the bushier Chondria minutula. The important thing in identification is look how the branches have smaller branchlets, usually ending in a pit. removal is fairly easy.
While macros that have fragile runners and creep along the surfaces are the hardest to manually remove, this macro tends to peel better than most. Get the holdfast and attempt to peel it off the infected surface, if you miss any go back and polish it off with the tweezers or a dental pick.

It just wiped off easily. Does it harm anything

 

[vetteguy53081]

It just wiped off easily. Does it harm anything

No- just assure it does not return. You can add of 1ml of peroxide per 10 gals at night at night to assist with control

 

[Jilly92]

No- just assure it does not return. You can add of 1ml of peroxide per 10 gals at night at night to assist with control

Thank you