i've heard you can stem their population by taking an empty (clean) glass salt or pepper shaker, put a leaf of spinach or lettuce in it, and put it in your tank overnight. supposedly it will attract the snails to it, and in the morning you just dump the snails out. it won't get rid of the eggs, but unless your tank is big enough for loaches, i've heard it's the most effective way to get rid of large numbers of snails at once.
So remember, when you're feeling very small and insecure,
How amazingly unlikely is your birth,
And pray that there's intelligent life somewhere up in space,
'Cause there's bugger-all down here on Earth.
Loki/Grendel/Gail/Beowulf/Camilla/River/Bathory/Arwen/Lafayette/Deb/Jack Skellington (soon)