Help Id. Is it snail calcium?

[Gordon Cashmore]

what are all these white dots that look like little snail shells Any ideas and good or bad?

 

[EleMental]

Spirobid worms. No worries [emoji6]

 

[nautical_nathaniel]

Completely harmless little buggers unless you try to scratch one off the wall of the tank and get it stuck underneath your fingernail like I did! Felt like a splinter was under there!

 

[Gordon Cashmore]

They are getting all over everything. How can I slow them down

 

[Somuchflo99]

They come and go