I just want to control the population. I don't think its an overfeeding issue. It looks like there were a lot of eggs on some plants I just introduced. Suddenly lots of tiny snails in the tank (without any that could have been the "parents"). If the population will naturally regulate with proper feeding I should be fine - was just afraid of what would happen when all these 1st generation baby snails grow up!
I have found that my fingers are the best selective snail killer around. My trap of choice is a piece of cucumber weighted down to sit on the bottom. Turn the lights off and check back in an hour or so, scrape off the offending snails, and repeat the process. Cleared out hundreds of MTS from my tank this way.
Manual removal is the best way to approach this problem. If you don't have the strength to get rid of them manually, you can put them in a container. For example, I have a peace lily growing in a water container on a counter with plenty of happy snails. So might be something you could try as well.
The worst defeat in the world, is when you give up.