White spots?

[coralosity351]

what are these white spots on the back tank wall?

 

[Cory]

Are they hard to scrape or soft?

 

[coralosity351]

Hard they take a little force to come off

 

[twobytwo]

My Guess is Spirorbids

 

[Cory]

Do they have a sort of spiral shell? Whats it similar to?

 

[coralosity351]

Yes they are spiral

 

[Jonathan blackwood]

Alien eggs.

 

[Roboson]

Sporibids, filter feeders. Normally a good sign, but it looks like you have a lot of them. Might be caused by a nutrient issue.

 

[Cory]

Yes ive got them too, notjing tinworry about except that they cover the glass. You just use a razor and scrape them off.