White spots on back of tank...

[kadaytar]

In the picture it looks like they are tiny air bubles- gas exchange of algae- stuck to algae film on the glass. I may be wrong but that is how it looks like in the pic.

[jasond]

Is that bad?

If I take one out on my finger, it is almost like a little piece of salt or sugar....and will break or crumble easily.

Maybe it doesnt matter at all, just havent seen it on anyone else's tank.

Thanks!

[kadaytar]

If they are like piece of salt or sugar they may be tiny spiral tube worms. They are not bad.

[fishoholic]

They are Spirorbid worms. Here's a link http://www.melevsreef.com/id/spirorbid_worms.html

[jasond]

You got it, thats what they look like, thanks!

[fishoholic]

Your welcome