best 'cover' for aquarium

Hi folks,
We're just setting up our new salt water aquarium. I've been reading
that it's better not to use a glass cover (which came with our tank),
however, I'm afraid that I might have issues with jumping fish,
'fishing cats' and cat hair in general inside the aquarium. I've been
reading about using eggcrate as a cover, but I'm not convinced that it
will be effective against cat hair. My girlfriend is also not
terribly convinced that eggcrate (black or even silver) will look nice
on top of the aquarium.

So, I'm wondering what other solutions you folks have been using out
there. Suggestions very much appreciated!

Thanks,
paul