Thank you all so much. It has been a very bad couple of weeks. Our 2 year old betta died last week (2 days before Asnee) - in a separate tank. Yesterday, the small blue snail I "rescued" a month ago with the broken shell - who never grew at all but his shell was repairing and he was trying to mate - died, too.

I thought I was taking good care of my wet pets - but now I'm feeling like a really bad caretaker. I checked the water parameters: pH 7.4, nitrate a little less than 5, barely registered ammonia. The 4 remaining snails seem to be fine - active, eating, growing (see my other post).