multies with pond snails

i recently tore down a planted tank in favor of a multie tank but i still have a few pond snails and trumpet snails in there. Will they disturb the breeding by eating up the multies eggs?
how can i get rid of them aside from starting from scratch - which i don't want to do because the sand in the tank is kind of expensive and more so i have some dwarf vals growing in the sand that i dont want to disturb