What are these white things?

[Dave-T]

I have a zillion tiny white specks on my back glass. About the size of a grain of sand. Here’s a bad picture. Any idea what these are? Snail eggs?

 

[EricR]

Looks like spirorbid worms to me, unless those aren't what you're talking about.

 

[muzikalmatt]

Looks like spirorbid worms to me, unless those aren't what you're talking about.

I second spirobid worms. They're harmless and usually a sign of a healthy reef tank.

 

[WheatToast]

I second spirobid worms. They're harmless and usually a sign of a healthy reef tank.

+1. Spirobid worms are harmless, filter-feeding tube worms.

 

[NoohpyT]

Spirobid worms 100%


Make sure you watch your Nitrate with these guys, I had decently high nitrates and their population boomed and covered my back wall

used an old credit card to scrape them off

still have them on my rock work which looks ugly imo

 

[Dave-T]

I second spirobid worms. They're harmless and usually a sign of a healthy reef tank.

Thanks. But - wait! I have a healthy reef tank?? Woot woot! It’s actually only a coupla months old, but any good signs are good signs.

 

[Dave-T]

Spirobid worms 100%


Make sure you watch your Nitrate with these guys, I had decently high nitrates and their population boomed and covered my back wall

used an old credit card to scrape them off

still have them on my rock work which looks ugly imo

My nitrates have never gotten above 12. Right now they’re at about 8, I just did a 20% water change after a (failed) treatment of chemiclean for cyano.