Should I get a variety of 'bottom' and 'surface' feeder fish?

Should I get a variety of 'bottom' and 'surface' feeder fish?

Marc Grover (Professional Aquarist) gives expert video advice on: Are goldfish easy to take care of?; How many fish should I get to start an aquarium?; How do I choose a healthy fish? and more...

When you're picking the fish for the tank, you have to look at your aquarium in levels. There are fish that spend time at the bottom, like catfish. There are surface fish, like hatchet fish that spend their entire time at the top of the tank. And then most fish are midlevel fish. There's a lot of different considerations for feeding all of those different levels. But depending on the shape of your tank, you're going to put emphasis on certain levels of fish, and consider how the fish spend their life at that particular part of the tank. So if I'm buying an aquarium that's just a standard rectangle tank, I'm going to have some fish that are bottom feeders, a majority of fish that are mid-water fish feeders, and some that are kind of on the surface, to fill up that area as well.