white circle things on rocks

[Jordan Wright]

Hello, i noticed these white circles all over my rocks, does anyone know what these are? and if they are harmful..

 

[Duffer]

Hard to tell with the pic, my guess would be some sort of sponge

 

[Jordan Wright]

Hard to tell with the pic, my guess would be some sort of sponge

are sponges bad?

 

[Rmckoy]

Either sponge or early stages of coralline algae
Is it squishy to touch or scaly ?.

 

[fishguy242]

hi,margarita snail eggs??

 

[Duffer]

are sponges bad?

Not at all. Tell sign the tank is healthy

 

[Arthur_Dent]

Pretty sure they are some kind of snail eggs. I have them all over my tank as well. I have scraped one before, and it's not soft like a sponge.

 

[Amstar]

Following along - same thing in my tank

 

[Trouble1375]

Nerite Snail Eggs

 

[Mr. Mojo Rising]

I've had these too for the past month. If snail eggs, how long do they take to hatch?

 

[Trouble1375]

I've had these too for the past month. If snail eggs, how long do they take to hatch?

More than likely your fish or corals will eat them as soon as they hatch. I’ve never seen baby snails and we get hundreds of eggs.

 

[Townes_Van_Camp]

Snail eggs