Quote Originally Posted by Morris Reese View Post
Those clips will work, but you have them upside down. The rounded part goes to the top. The clip should latch over to the screen and securely hold to the sold top side.
You're right - there is something off about that clip...

Quote Originally Posted by John1982 View Post
Clip is oriented correctly, you just don't have it attached right. Push the top forward(towards the screen) until it locks in between the screen and metal frame of the lid. Once you get it in there it stays well enough on it's own. You unlatch by pulling down on the part that's between the glass and plastic frame of the aquarium.
That's IT!