Acrylic panes instead of glass will improve light going into the tank. Not
sure about Q. No 2.

"Greg Dalton" wrote in message
...
I've got a 3-bulb hood on a glass top....Condensation forms on the glass
top and I know it has to block alot of the light going into the tank...?

My tank is pretty well sealed up? Do I need some air movement under the
glass?

Thanks