Blue growth irritating/damaging zoas?

[NanJ]

Has anyone seen something like this on zoas? We have several zoa frags that have been doing well in our tank for the past several months and then this week most have closed up. I saw this strange blue stuff on a BamBam frag. It is jelly-like and the color of mold that gets on bread. Photos attached - no lights on the tank, just natural room light.
Any ideas?
.

 

[Reefer40b]

Sponge, peel it out and toss in sump.

 

[NanJ]

Sponge, peel it out and toss in sump.

Ah! Thanks

 

[Krixic]

Sponge, peel it out and toss in sump.

Why toss it in the sump? Do they provide any benefits? I've never had one so My experience with them

 

[Mike N]

Why toss it in the sump? Do they provide any benefits? I've never had one so My experience with them

They're a 24/7 filter that requires no power or media. Small impact, but impact nonetheless.

 

[Krixic]

They're a 24/7 filter that requires no power or media. Small impact, but impact nonetheless.

Cool! Thanks

 

[Reefer40b]

They're a 24/7 filter that requires no power or media. Small impact, but impact nonetheless.

True story. I have some that have fully covered my live rocks in my sump just by doing this.

 

[NanJ]

So can white colored sponges cover zoas to the point that the zoas die? Several other small colonies (10-20 heads) are tightly closed and maybe have some white stuff around the heads.