Boxcar Muzzdogg
Fish Crazy
I found these instructions for building your own inexpensive and effective tank covers. I don't know if there is already a topic on this but I felt compelled to post this because it can save tons of money. I actually found this on the site of the Grater Chicago Cichlid Association. There are a few other DIY's on there too.
http/www.gcca.net/howto/tank_covers.htm
http/www.gcca.net/howto/tank_covers.htm