Today, in my 3.5g (that's been empty for a few weeks minus some wafers to keep the cycle) I found a baby snail. I got a nerite, mystery, 2 ottos, and some elodea and quarantined them for a week in there then put them in my main tank. Haven't changed the water since then. Most of the water in that tank came from my own water, not the store's. It is tiny. I don't know if there are more. Can some people post pictures of baby snails so I can find out what kind it is?