Good idea. The other day I was bored so I decided to modify the metal screen top to my 20gal. I got some cardboard, an exacto knife, some garbage twist ties and a pen. I traced the size of the screen top on the cardboard, cut it out, traced a bowl thats a bit bigger than my lamp, cut it out. Then got some metal twisty ties, and secured it to the top, but on the inside. I'm hoping it'll keep in humidity, and stop nose rubs. :)