My aquarium didn't come with a hood so I've been looking at some online I couldn't find any in local stores for a 5 gallon. I thought this information would be easy to find but I've searched a lot and not found an answer. When you measure your aquarium for a hood, which part of the top do you measure? The outside edges? The inside edge so that you're measuring the hole in the top? Or the inside of the trim where the tiny ledge is?
And should I try to get one that includes a light? Do bettas like a light? Would LED or the older style bulb be best?