Getting rid of bush snails?

[u bada]

I cultivate mosses and other plants that could retain chemicals, and these mosses and such I shift around to animal tanks, so gets risky. Plus I sorta want to have some sort of rounded ecology in all of the tanks to keep other pests in balance (ie keep springtails alive, etc.).

Obviously, if bush snails keep wrecking flowers and new growths than it may be more a priority to kill them to make all the $$ into mini orchids more worthwhile...

So what's the verdict on metaldehyde and sevin in actually attracting snails to them? I'm thinking maybe I can fix up some sort of bait stations that can be removed if they actually attract them? (As naoki pointed out iron phosphate products don't actually attract them for instance)