I used eggcrate for a long time until I made a custom top. The eggcrate isnt that visible from the front. Just cut it to fit on the lip of the tank. Also it isnt crazy to use eggcrate. It is so much better for your system to be open to the air, aka natural... Gas exchange, heat exchange, better light, less salt deposit. It is a good idea, although with the eel I am not sure that it is strong enough to put heavy stuff on eggcrate. I would stick with the glass or make a custom canopy. Just be sure to leave no holes. I have heard of people waking to find an eel halfway across their living room floor or worse yet a tail hanging out of their dogs mouth.... Just before it slips down the hatch...LOL.... Good luckk :hilarious :hilarious :hilarious :hilarious