Quote Originally Posted by Greg'sGarters View Post
Personally, I like the first type of clips. I use these...
I prefer slide lock tanks, but for after-market screens made for aquariums, I also use the same kind you do Greg. They didn't come with instructions of any kind but I eventually figured them out. The key is to bend them (to adjust) so they clamp tight. Also, gotta use one on all 4 sides of the lid. A pain to get into the tank but this frees up the top for overhead lights.

But I suppose bricks work too as long as they're heavy enough. Don't underestimate the strength a snake has to wedge his head under the screen. If he can manage that, he could get stuck if the bricks are heavy, but not heavy enough.