what kind of snails are they??? personally i like snails and think they are great for cleaning but any snowflae eels i had would make quick work of any snail or cran that hit my tank with him i could never have any snails or crabs.....some of my other eels didnt care for snails though and they do find a taste for small fish later.
the best answer would be to just scoop them out manually every night when they are active...eventually you should make a dent in their population
cheers!!
***** edit**** reefsafe fish that eats snails arent really reefsafe then are they lol???
cheers