Is it a screen top? Covering half of it will work good. Also I have to recommend something that might sound strange, I know it was to me when I first got into ball pythons. You can go to target, walmart, home depot, etc. and get a 41qt or 28qt sterilite tub for about 8 dollars. Drill some holes in the top or use a wood burner kit for air holes. The snake will thrive better in that tub then a 10 gallon aquarium. It doesnt look that bad either. I can still see my snakes if I look in the tub up close. Have you owned ball pythons before? I just noticed you've been on the forum for a while so I might just be telling you stuff you already know.