Oh my!!! Rusty will definitely have some adjusting to do. I would almost guarantee some hi jinks but not to the point of bloodletting. You may have hit on a very novel and useful idea with the small tank inside of the larger tank, but he is still going to show them who is boss when they invade his territory, just so you are prepared. The snail will be no trouble at all. He will bounce off of it a couple of times and decide it isn't worth it but the Cories are going to get chased. Everyone will be okay I am sure but it will be an experience that will try your patience I can promise you.

(but remember we love them anyway

) Good luck and please keep us informed. I am interested to hear how it goes. I really only have experience with the introduction of Otos, so I hope that you have a different experience with the Cories.
Rose
