Snail QT question?

[thePWNISHER]

So I finally broke down and bought a mystery snail. I've never had one before. I'm QTing him in a 1gallon bowl, placing an a broken piece of algae wafer after each water change, I'm changing every 24 to 36 hours right now.

So my question is....How do I know if he's ready for the main tank? I mean with fish you just watch behaviour and look for ich and stuff but this is a snail. He likes to just curl up and sleep most of the day then he'll pop out and eat for 30min, climb to a new spot then sleep again for a few hours. I really do not know what kind of oddities I need to watch out for and online I've just found info about diet and water params but nothing is tipping me off on if he's acting strangely at all.