Thumbs up on the post above
I would put all my snails upright and if you have a star fish, don't expose to air and try to drip acclimate for at least an hour or 2, than float in a bag or Tupperware till the temp meets up. Don't ever use anyone's water #1, ever!!
Your more than welcome. There's never a silly/weird question to ask with marine life, the more info we get the more we can do and help one another out
Every tank has there ups and downs so don't get disappointed when something dies. That's life