David I have to respectfully disagree with you

since I love mystery snails. When mine laid eggs the angels ate the babies about as fast as they hatched. I have green, Yellow and striped Mystery snails. They are spread among all my tanks and they do a good job cleaning up the algae but haven't touched my plants.
Dojella - you can put sliced zucchinni, cucumbers, veggie wafers. Basically anything that is vegetable based. Since their confined to a 10g they aren't likely to over populate and spread if they were so inclined. Mine haven't laid eggs again. I wish they would. Your LFS may take them for store credit.
Carol