My girlfriend just got a new blue mystery snail and when I was adding it to the tank I noticed a very small brown worm inching along the glass in the gravel. I wanted to treat for parasites but didn't know if there were any precautions to take with dosing a snail, and she doesnt have any other tanks to qt him in right now. So, are snails overly sensitive to meds or anything weird or should I just go ahead as normal?