Well my sister just got a 10 gallon aquarium and to help her cycle her tank, I would like to provide her use of my sponge filter for a week or so to seed her biofilter. The only problem is that she wants to go fish only with plastic decoration and no snails but this sponge is in my planted tank with snails and they have colonized the filter media. Anyway to remove the snails without killing the nitrifying bacteria?