I like glass. I actually went to a glass shop. I have a 20gal high aquarium. I got glass cut to 23 3/16in long and 9in wide 1/4in thick, with what they called a knock down edge, so it wouldn't be sharp. It was about $9. I have about an inch in front that I drop the food into, and the space in the back is for the filter. Works great, and was inexpensive. My light is right above the glass.