Any chance these breed in large sumps.

[Koigula]

Here is baby snail that mysteriously appeared. I had the large ones from Algae Barn for 5+ years and moved to a refugium as they are bulldozers.

Anyone see these breed before. I have 100 gallon sump and 30 gallon refugium with no competion. I rarely bother adult aside from this photo

 

[vetteguy53081]

Astrea may and limpets will