It sounds like you are well on your way to becoming cyano-free!
Removing the glass top was definitely a good choice. Your tank should run cooler now too. Have you looked into using a filter sock for when you get your sump set up? I know several people that have bought 2 filter socks and actually swap them out daily.
http://www.marinedepot.com/aquarium_...ck.asp?CartId=