Yeah Canada, the glass top really isn't necessary, but like what he also said, it depends on the kind of fish you got. And the glass top does reduce a small amount of light if the bulb is put over the glass. Sometimes the glass tops get stained, and that might block off like 7-10% of light. I have a glass top, only because I got little people in the house occasionally, and they always throw something in the tank... lol
Last edited by Tenzo; 08-08-2010 at 06:44 AM.