Hello,
I am new here, but I have a solution for you.
I have a 46g bow front aquarium with live plants and I never had an issue with snails. I do a bleach dip and it gets rid of hitchhikers.
This is what I do:
• Make a 19/1 water/bleach mix in a bucket (approximate, I never measure it)
• Dip plants for about a minute (I usually gently shake them in the water left to right)
• Remove from bucket
• Put under running water. I use the rain setting of my hose nozzle
• Put in another bucket with water and add water conditioner/dechlorinator
• Wait a minute or two
• Put in tank
I have never had snails or water parameters effects doing this. I even did it to java moss which was filled with tiny snails. It got rid of them all.
There is also a Peroxide solution that seems to work as good, but I have never done it.
Feel free to do a google search if you need more info.
Good luck with your plants.