I have been told by anyone and everyone that breeding snails is easy, etc, etc. I have never had a snail population problem (even with purchasing live plants) because of my green spotted puffer.
I decided I wanted to actually breed them for him. I purchased 10 of them, put them in a large container by the window, put in lettuce, and after a few days the water smelled so bad and was so cloudy that I couldn't see them or go anywhere near it. So I do a water change, and same thing, over and over and over.
The snails were very hardy, as they never died, but I ended up just having to feed them to my puffer. I tried this over and over... probably 4-5 times, and always end up just feeding the snails to my puffer.
It seems as if the people who despise snails get outbreaks, and the people who TRY to get snails can't produce them!!!