I've found the pond snails having orgies in my filters!!! (I was wondering about the faint sounds of house music & clinking glasses @ 2:00 AM!)
I don't sweat it. I remove what I can, when I can. I find the babies really tough to handle, and I can only get at the egg sacs on the glass. I have a good friend that is a director of the Boston Macological Club (a shell club but they study mollusks, I know, nerd alert). I asked him what to do, and he said to return them to a local pond where they will be food for larger fish (circle of life & so on) BUT I really don't have the time to visit a pond all the time. I'm thinking of just getting a jar w/ a salt solution to drop them in, hoping for a quick death.
4 bettas: Butch, 3-year-old violet male PK EE & 3 girls in a 30 gal sorority. I do not name the girls anymore! 1/2 of them die within a month.
30 gal: 9 Oto cats, 4 Ocellifer cats. Inverts: Cherry shrimp & 2 assasin snails.
10 gal.: Butch, his 5 oto cats, 3 assasin snails, and a few snails the assassins haven't caught.