I bought 10 Cerith Snails at elite reef fest on saturday. I woke up today and checked the tank to see how they were doing, to my surprise there was a small white ribbon along me over flow along with two of the snails. I'm amazed they did this since allot of people and blogs have told me that they are nearly impossible to breed. I'm pretty hopeful they will survive since there is nothing in the tank to eat them. I guess it's a good sign that I can add fish now.