Green hairy mushroom, good or bad?

[Drew1900]

I wanted to see everyone’s opinions and experiences on green hairy mushrooms. I have a 20 gallon mixed reef and currently have a green hairy mushroom in quarantine. I’m a fan of how they look but I am hesitant about how quickly they can reproduce.

 

[Doctorgori]

-honestly in 20g it's A small chance but yeah they got loose on me once

 

[kichimark]

They are awesome corals. If they grow on you, just frag them and trade for more corals.