help cant keeep this glass tank warm

[Alexiel03]

PS, if the top is open screen cut a piece of lexan, acrylic, plexiglass or similar material and dril some holes in it to allow airflow but, at a slower rate than a fully open top. This will help retain both warm air and moisture.

i did that with my 20 gallon screen top tank, but i used a piece of cardboard covered it with some foil and poked holes in it for ventilation...its cheap and works great for keeping both humidity and heat in the tank.