I really want to get a crested gecko but I'm having trouble with the cage. I would like to get a 20 gallon long tank when Petco has their dollar per gallon sale. I also would like to get this lid for it: https://www.amazon.com/dp/B000QFQ698..._eP1RzbF7F0T1S

I know it says it comes with hinges so does that mean when I turn the 20 gallon on its side and put the lid on it will the lid be able to clamp on to the tank without falling off? I'm worried about the crested gecko pushing the lid off so I wanna make sure it will be secure. Thanks in advance!