[GSAS-Member] what's the state-of-the-art of snailicides?

[matt kaufman <igotadose@hotmail.com>]

Once upon a time, tribal knowledge on Usenet was that you could use Alum USP to kill snails. I found you needed really big quantities to have any perceived benefit.
So, is there some more modern chemical recipe that's readily available for killing snails? 
 
I've been fairly successful keeping the horror of malaysian burrowing snails at bay (they're a nightmare in killi tanks, they eat eggs. Nor can you put in loaches, because they eat eggs and killies). However, I just bought a bunch of new plants last night - Yay! - and I'm wondering that, short of inspection by hand, if someone's got a foolproof recommendation?
 
I have also heard that Potassium permanganate works; not sure you can readily obtain it, though, and I thought its a hazard to plants, too.
 
Thanks!
 
Matt
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