see through shell with black dot

[rtcgibbo]

On my glass there are loads of see through shells with black dots in any body know what this is?

 

[aquaman95]

are there millions of them in the rocks moving

 

[rtcgibbo]

No there not snails I dont think theres about 20 at a time ill clean them of and theyl returm. The shel ivevjust relised is not totally see through but a bit cloudy. I do get quite abit of algae could it be to do with that?

 

[aquaman95]

no they are from waste <poop> of the fish plus the food u use built up in the rock sand or substrate creating a lifeform that breeds in it
they will easily be eliminated by a very very large sucker fish buy new rocks because boiling doesnt work they wont kill the fish
if u could get a pic that would e great they might also be body borers let me know if your fish loses scales