I ordered a cheap surface skimmer and hopefully works. It's just not the dust, it's also cleaning chemicals my wife uses around the house.
I have a kitten about to turn 1 years old. I came home one day to find her sitting on the glass top looking down with great fascination. I wish I had my camera but she dove off the top the second she saw me coming towards her. If I ever removed the glass, I'll need the screen top for sure, but I just don't think a screen will hold the weight of my obnoxious cat.
Sorry about yur cat, I'm overly protective with my cat. Well, I decided to leave the top open except when the wife is cleaning and doing heavy cooking. Tank is by the dining room.Aww that's a cool cat! I miss mine terribly, it died 2 days ago, car hit him. sucks.
Back to topic!
Figure about 10-15% loss in light penetration depending if its clean, more if its not.
As long as your fish aren't gasping at the surface, day or night, you should be fine.