If you have floating plants they need some air movement or they may get
scorched. Just keep an eye out for browning/drying leaves on surface, add an
air pump or fan if needed.
Cris

In article , Greg Dalton
writes:

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?