I'm in the process of setting up a 10gal tank for my soon-to-be-purchased young corn (not sure how old yet, as I'm picking one up at the expo, but it will be less than 1 year). The lid is, of course, something I need to get right since these guys can really escape. I picked this up at WalMart today and it seems fine, but I wanted some expert advice before I settle...there's still time to buy a zoomed locking top online.

This is the bag it came in


This is the cover on the tank


If not this, or a zoomed, then can you give me some suggestions on good secure tops?
Thanks