u/Appropriate-Slice928

So I got some snails from aquaticmotiv, (I ordered on Amazon) they arrived today, there was no water in the bag, just two sealed bags with a paper towel and the three snails, the paper towel was wet, but there also isn’t instructions, I took the snails out and put them into water, how do I know if they’re alive?? Cause like they aren’t moving around or anything.. how long do I wait? Also should they have come in water?

I noticed her acting a little off on Monday so a week ago, she slowly just got worse.. I thought she was dead this morning but she is still alive.. what do I do? I don’t think she has had any babies for a few months, she has been thin, but normally after she gives birth she is thin until she’s pregnant again.. all the parameters are good, the ammonia was 0, the nitrite is 0, the ph is 7, the nitrite was 0 and the temperature is 78-79. The water and tank has been cleaned and there is a pleco living in the tank with aome bladder snails that I’ve been slowly removing.. I did a full water change at the first of April, because the water hadn’t been changed just added to over the winter. So far since the snails are in the tank there are some dark spots on the side of the glass.. I cleaned them off last week but there are some more.. and I’ve noticed some babies recently I’m not sure which fish had them.