I think it is sponge, is it a sponge?

[crazysun]

So bought a Chalice and this thing was under it. I think it is a white sponge, is it a sponge?

 

[Scrubber_steve]

Yes, looks like a cryptic sponge

 

[tdileo]

Your assumption about that sponge being a sponge was correct. That is indeed a sponge

 

[crazysun]

Good? bad? leave it? or rip it out?

 

[crazysun]

Will sponges spread to other areas of the tank?

 

[crazysun]

How will it behave with the Chalice?

 

[kirstyflash]

They can smother corals, I just keep mine in check and if it gets too big just scrape it off, other wise just a filter feeder

 

[crazysun]

Does anyone know if sponges spread to other areas of the tank?