rip_van_winkle

I just got a horned snail that was born about two weeks ago in our school aquarim for my home aquarim. I have 5 danios, and a few dieing plants in a 10 gal. if it makes a differance. Do I need to acclimate my little snail? any tips on how to keep him from getting out of the bag? Also, they wern't feeding the snails directly at school because they don't want them, so they were just letting the snails eat old food that the fish didn't get. Will this snail be ok on what is left over from the 5 danios or do i need to give him letteuce or pleco pelts or something? I know, I know, it was stupid of me to bring him home without finding more out about him. But please hurry because He is currently sitting in a water bottle!!!
Thank you!
~Hannah