I just take a look at the tank after the lights off. There are more than a hundred small snails on the glass. What is the limit of snails can I have in a 55 gallon tank? How do I control snail population?
Give extras away.
Seriously - a few of our folks have had just way too many cerith snails.
So they give them away. Makes a good gift for newbies, and also can be used in trade for frags.