Oval shape snail in bubble blaster

[no1bubba]

I just found 7 oval shaped (smails) on the inside cone of my bubble blaster. They are the size of a little finger nail and smaller. I don't see them in the sump or dt. Anyone have a clue? Bubba

 

[budsreef]

Probably Limpets.

 

[rockdog]

Or stoatella, if they had a flat shell.

If the shell had a point at the top its a Limpet.

 

[miami dolfan]

I get these stuck in my MRC 3 all the time. Quite a nuisance.