I just got rid of my last tank and I found a few left over snails (stoma, naus, astria, etc.) and there is still a 20g sump with a ton of stuff in it. If you want ot come up to Salem MA today and take the snails and pick through the sump for hermits, shrimps, snails, and other stuff than you can for free. Other than that I will just be throwing them all out when I get the tank and filters down.