I was prepared to get a lot more than I bought, and I specifically ordered for a tank that's around half the size of mine.
45 Dwarf Ceriths
14 Florida Ceriths
6 large & 8 small-med Nerites
What I got was (and yes, I counted!):
276 Dwarf Ceriths
15 Florida Ceriths (already had four or five that I caught on the beach, so I'm glad he didn't give me a ridiculous amount extra)
16 Nerites total
I dumped them in and it looked like I had left of a cerith atomic bomb! They're STILL crawling all over the place! I'll have more than enough for when I get a bigger tank, and several more tanks, too!!
And to think, at one point I saw you say that your mother was a math teacher!