hard white spots

[rbrockm1]

i have these hard small circle white spots on my glass walls. its like coraline algea but all of them are circles and about the same size. they are ablout the size of this smiles head :thinking: what are they

 

[keith burn]

got a pic

 

[michaeltx]

I think its a type of worm. cant remember the name though it creates a calcium tube that it lives in.
Mike

 

[ccg24]

Those are normal! lol... there polyps or coraline (spelling maybe off) something but there not bad... whatever kinda cleaning crew you have will enjoy them!! someone might be able to tell you more about them and what they do, but I can tell you that there not bad! ok.