Yeah. I don't have cpds in mine. I think however, glass tops are a good to have for lots of fish in these tanks. If they get spooked, you very well may find them on the floor days later even if they aren't known jumpers. The other day I was about to clean the glass on my tank (and I have a glass top that I had made) and set down a small towel in front of the tank, turned around to pull up a chair and went to pick up the towel and discovered that my otocinclus was laying on it. I spooked him when I moved the chair I figure. And I also had a top on the tank, but he made the leap through a small small opening. Lucky that he landed on the white towel. If not, he would have been food for my cats.
best, el g